diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4f3056d434..1dfccdbf50 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1504,39 +1504,6 @@ stress:recursive:freebsd12:amd64:
     variables:
       - $CI_COMMIT_TAG || ($BIND_STRESS_TEST_OS =~ /freebsd/i && $BIND_STRESS_TEST_MODE =~ /recursive/i && $BIND_STRESS_TEST_ARCH =~ /amd64/i)
 
-# ABI check
-
-abi-check:
-  <<: *base_image
-  stage: build
-  needs:
-    - job: autoreconf
-      artifacts: true
-  variables:
-    CC: gcc
-    CFLAGS: "${CFLAGS_COMMON} -Og"
-    EXTRA_CONFIGURE: "--enable-dnstap --with-libidn2"
-    BIND_BASELINE_VERSION: v9_17_9
-  script:
-    - *configure
-    - make -j${BUILD_PARALLEL_JOBS:-1} V=1
-    - git clone --branch "${BIND_BASELINE_VERSION}" --depth 1 https://gitlab.isc.org/isc-projects/bind9.git refbind
-    - cd refbind/
-    - autoreconf -fi
-    - *configure
-    - make -j${BUILD_PARALLEL_JOBS:-1} V=1
-    - cd ..
-    - util/api-checker.sh . refbind
-  artifacts:
-    paths:
-      - "*-lib*.html"
-      - "*-lib*.txt"
-      - "abi-*.dump"
-    expire_in: "1 week"
-  only:
-    - main@isc-projects/bind9
-    - /^v9_[1-9][0-9]$/@isc-projects/bind9
-
 gcov:
   <<: *base_image
   <<: *default_triggering_rules
diff --git a/configure.ac b/configure.ac
index 75fc3fbd50..2944b3ca44 100644
--- a/configure.ac
+++ b/configure.ac
@@ -71,17 +71,6 @@ AS_IF([test "$cross_compiling" = no],
       [AM_MAINTAINER_MODE(m4_ifset([bind_SRCID],[enable],[disable]))],
       [AM_MAINTAINER_MODE([disable])])
 
-# Set the library versions
-# https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-
-AX_BIND9_LIB_VERSION([bind9])
-AX_BIND9_LIB_VERSION([dns])
-AX_BIND9_LIB_VERSION([irs])
-AX_BIND9_LIB_VERSION([isc])
-AX_BIND9_LIB_VERSION([isccc])
-AX_BIND9_LIB_VERSION([isccfg])
-AX_BIND9_LIB_VERSION([ns])
-
 #
 # Enable system extensions to C and POSIX
 #
diff --git a/lib/bind9/Makefile.am b/lib/bind9/Makefile.am
index f981c9216d..f3e8c377fc 100644
--- a/lib/bind9/Makefile.am
+++ b/lib/bind9/Makefile.am
@@ -28,6 +28,4 @@ libbind9_la_LIBADD =		\
 
 libbind9_la_LDFLAGS =		\
 	$(AM_LDFLAGS)		\
-	$(libbind9_VERSION_INFO)
-
-EXTRA_DIST = api
+	-release "$(PACKAGE_VERSION)"
diff --git a/lib/bind9/api b/lib/bind9/api
deleted file mode 100644
index 1f742a50af..0000000000
--- a/lib/bind9/api
+++ /dev/null
@@ -1,16 +0,0 @@
-# LIBINTERFACE ranges
-# 9.6: 50-59, 110-119
-# 9.7: 60-79
-# 9.8: 80-89, 120-129
-# 9.9: 90-109, 170-179
-# 9.9-sub: 130-139, 150-159, 200-209
-# 9.10: 140-149, 190-199
-# 9.10-sub: 180-189
-# 9.11: 160-169,1100-1199
-# 9.12: 1200-1299
-# 9.13/9.14: 1300-1499
-# 9.15/9.16: 1500-1699
-# 9.17/9.18: 1700-1899
-LIBINTERFACE = 1701
-LIBREVISION = 4
-LIBAGE = 0
diff --git a/lib/dns/Makefile.am b/lib/dns/Makefile.am
index 61c0ef45c2..d996b5b16d 100644
--- a/lib/dns/Makefile.am
+++ b/lib/dns/Makefile.am
@@ -22,7 +22,6 @@ gen$(BUILD_EXEEXT): gen.c gen-unix.h
 	$(CC_FOR_BUILD) -g -I. $(GEN_NEED_OPTARG) $(srcdir)/gen.c -o $@
 
 EXTRA_DIST =		\
-	api		\
 	dnstap.proto	\
 	gen.c		\
 	gen-unix.h	\
@@ -282,7 +281,7 @@ libdns_la_CPPFLAGS =		\
 
 libdns_la_LDFLAGS =		\
 	$(AM_LDFLAGS)		\
-	$(libdns_VERSION_INFO)
+	-release "$(PACKAGE_VERSION)"
 
 libdns_la_LIBADD =		\
 	$(LIBISC_LIBS)		\
diff --git a/lib/dns/api b/lib/dns/api
deleted file mode 100644
index 73f959a036..0000000000
--- a/lib/dns/api
+++ /dev/null
@@ -1,16 +0,0 @@
-# LIBINTERFACE ranges
-# 9.6: 50-59, 110-119
-# 9.7: 60-79
-# 9.8: 80-89, 120-129
-# 9.9: 90-109, 170-179
-# 9.9-sub: 130-139, 150-159, 200-209
-# 9.10: 140-149, 190-199
-# 9.10-sub: 180-189
-# 9.11: 160-169,1100-1199
-# 9.12: 1200-1299
-# 9.13/9.14: 1300-1499
-# 9.15/9.16: 1500-1699
-# 9.17/9.18: 1700-1899
-LIBINTERFACE = 1709
-LIBREVISION = 0
-LIBAGE = 0
diff --git a/lib/irs/Makefile.am b/lib/irs/Makefile.am
index f7b82b47bc..eac972b26d 100644
--- a/lib/irs/Makefile.am
+++ b/lib/irs/Makefile.am
@@ -24,11 +24,8 @@ libirs_la_LIBADD =		\
 
 libirs_la_LDFLAGS =		\
 	$(AM_LDFLAGS)		\
-	$(libirs_VERSION_INFO)
-
+	-release "$(PACKAGE_VERSION)"
 
 if HAVE_CMOCKA
 SUBDIRS = tests
 endif
-
-EXTRA_DIST = api
diff --git a/lib/irs/api b/lib/irs/api
deleted file mode 100644
index 88c9b9df52..0000000000
--- a/lib/irs/api
+++ /dev/null
@@ -1,16 +0,0 @@
-# LIBINTERFACE ranges
-# 9.6: 50-59, 110-119
-# 9.7: 60-79
-# 9.8: 80-89, 120-129
-# 9.9: 90-109, 170-179
-# 9.9-sub: 130-139, 150-159, 200-209
-# 9.10: 140-149, 190-199
-# 9.10-sub: 180-189
-# 9.11: 160-169,1100-1199
-# 9.12: 1200-1299
-# 9.13/9.14: 1300-1499
-# 9.15/9.16: 1500-1699
-# 9.17/9.18: 1700-1899
-LIBINTERFACE = 1701
-LIBREVISION = 0
-LIBAGE = 0
diff --git a/lib/isc/Makefile.am b/lib/isc/Makefile.am
index 57f5b19f5a..c516fd5458 100644
--- a/lib/isc/Makefile.am
+++ b/lib/isc/Makefile.am
@@ -229,7 +229,7 @@ libisc_la_CPPFLAGS =		\
 
 libisc_la_LDFLAGS =		\
 	$(AM_LDFLAGS)		\
-	$(libisc_VERSION_INFO)
+	-release "$(PACKAGE_VERSION)"
 
 libisc_la_LIBADD =		\
 	$(LIBUV_LIBS)		\
@@ -255,5 +255,3 @@ endif HAVE_LIBXML2
 if HAVE_CMOCKA
 SUBDIRS = tests
 endif
-
-EXTRA_DIST = api
diff --git a/lib/isc/api b/lib/isc/api
deleted file mode 100644
index 313f25dc92..0000000000
--- a/lib/isc/api
+++ /dev/null
@@ -1,16 +0,0 @@
-# LIBINTERFACE ranges
-# 9.6: 50-59, 110-119
-# 9.7: 60-79
-# 9.8: 80-89, 120-129
-# 9.9: 90-109, 170-179
-# 9.9-sub: 130-139, 150-159, 200-209
-# 9.10: 140-149, 190-199
-# 9.10-sub: 180-189
-# 9.11: 160-169,1100-1199
-# 9.12: 1200-1299
-# 9.13/9.14: 1300-1499
-# 9.15/9.16: 1500-1699
-# 9.17/9.18: 1700-1899
-LIBINTERFACE = 1707
-LIBREVISION = 1
-LIBAGE = 0
diff --git a/lib/isccc/Makefile.am b/lib/isccc/Makefile.am
index aca06f777f..d5cc537ead 100644
--- a/lib/isccc/Makefile.am
+++ b/lib/isccc/Makefile.am
@@ -36,10 +36,8 @@ libisccc_la_LIBADD =	\
 
 libisccc_la_LDFLAGS =		\
 	$(AM_LDFLAGS)		\
-	$(libisccc_VERSION_INFO)
+	-release "$(PACKAGE_VERSION)"
 
 if HAVE_CMOCKA
 SUBDIRS = tests
 endif
-
-EXTRA_DIST = api
diff --git a/lib/isccc/api b/lib/isccc/api
deleted file mode 100644
index c1c1be9b85..0000000000
--- a/lib/isccc/api
+++ /dev/null
@@ -1,16 +0,0 @@
-# LIBINTERFACE ranges
-# 9.6: 50-59, 110-119
-# 9.7: 60-79
-# 9.8: 80-89, 120-129
-# 9.9: 90-109, 170-179
-# 9.9-sub: 130-139, 150-159, 200-209
-# 9.10: 140-149, 190-199
-# 9.10-sub: 180-189
-# 9.11: 160-169,1100-1199
-# 9.12: 1200-1299
-# 9.13/9.14: 1300-1499
-# 9.15/9.16: 1500-1699
-# 9.17/9.18: 1700-1899
-LIBINTERFACE = 1703
-LIBREVISION = 0
-LIBAGE = 0
diff --git a/lib/isccfg/Makefile.am b/lib/isccfg/Makefile.am
index a9853decfc..3205e3b93b 100644
--- a/lib/isccfg/Makefile.am
+++ b/lib/isccfg/Makefile.am
@@ -32,10 +32,8 @@ libisccfg_la_LIBADD =	\
 
 libisccfg_la_LDFLAGS =		\
 	$(AM_LDFLAGS)		\
-	$(libisccfg_VERSION_INFO)
+	-release "$(PACKAGE_VERSION)"
 
 if HAVE_CMOCKA
 SUBDIRS = tests
 endif
-
-EXTRA_DIST = api
diff --git a/lib/isccfg/api b/lib/isccfg/api
deleted file mode 100644
index 2a38956a54..0000000000
--- a/lib/isccfg/api
+++ /dev/null
@@ -1,16 +0,0 @@
-# LIBINTERFACE ranges
-# 9.6: 50-59, 110-119
-# 9.7: 60-79
-# 9.8: 80-89, 120-129
-# 9.9: 90-109, 170-179
-# 9.9-sub: 130-139, 150-159, 200-209
-# 9.10: 140-149, 190-199
-# 9.10-sub: 180-189
-# 9.11: 160-169,1100-1199
-# 9.12: 1200-1299
-# 9.13/9.14: 1300-1499
-# 9.15/9.16: 1500-1699
-# 9.17/9.18: 1700-1899
-LIBINTERFACE = 1704
-LIBREVISION = 0
-LIBAGE = 0
diff --git a/lib/ns/Makefile.am b/lib/ns/Makefile.am
index 243d087c5c..cdfc6192bc 100644
--- a/lib/ns/Makefile.am
+++ b/lib/ns/Makefile.am
@@ -56,10 +56,8 @@ libns_la_LIBADD =	\
 
 libns_la_LDFLAGS =		\
 	$(AM_LDFLAGS)		\
-	$(libns_VERSION_INFO)
+	-release "$(PACKAGE_VERSION)"
 
 if HAVE_CMOCKA
 SUBDIRS = tests
 endif
-
-EXTRA_DIST = api
diff --git a/lib/ns/api b/lib/ns/api
deleted file mode 100644
index f55bd9eef6..0000000000
--- a/lib/ns/api
+++ /dev/null
@@ -1,16 +0,0 @@
-# LIBINTERFACE ranges
-# 9.6: 50-59, 110-119
-# 9.7: 60-79
-# 9.8: 80-89, 120-129
-# 9.9: 90-109, 170-179
-# 9.9-sub: 130-139, 150-159, 200-209
-# 9.10: 140-149, 190-199
-# 9.10-sub: 180-189
-# 9.11: 160-169,1100-1199
-# 9.12: 1200-1299
-# 9.13/9.14: 1300-1499
-# 9.15/9.16: 1500-1699
-# 9.17/9.18: 1700-1899
-LIBINTERFACE = 1707
-LIBREVISION = 0
-LIBAGE = 0
diff --git a/m4/ax_bind9_lib_version.m4 b/m4/ax_bind9_lib_version.m4
deleted file mode 100644
index dd08f6b7d7..0000000000
--- a/m4/ax_bind9_lib_version.m4
+++ /dev/null
@@ -1,10 +0,0 @@
-AC_DEFUN([AX_BIND9_LIB_VERSION],
-         [AS_IF([test -z "$SED"],
-                [AC_PROG_SED])
-          AS_IF([test -z "$SED"],
-                [AC_MSG_ERROR([sed not found, but required, set \$SED to sed])])
-          ax_bind9_lib$1_current=`$SED -n "s,^LIBINTERFACE = \(.*\),\1,p" "$srcdir/lib/$1/api"`
-          ax_bind9_lib$1_revision=`$SED -n "s,^LIBREVISION = \(.*\),\1,p" "$srcdir/lib/$1/api"`
-          ax_bind9_lib$1_age=`$SED -n "s,^LIBAGE = \(.*\),\1,p" "$srcdir/lib/$1/api"`
-          AC_SUBST([lib$1_VERSION_INFO],["-version-info $ax_bind9_lib$1_current:$ax_bind9_lib$1_revision:$ax_bind9_lib$1_age]")
-         ])
diff --git a/util/api-checker.sh b/util/api-checker.sh
deleted file mode 100755
index 978731b037..0000000000
--- a/util/api-checker.sh
+++ /dev/null
@@ -1,83 +0,0 @@
-#!/bin/bash
-#
-# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
-#
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, you can obtain one at https://mozilla.org/MPL/2.0/.
-#
-# See the COPYRIGHT file distributed with this work for additional
-# information regarding copyright ownership.
-
-set -e
-
-# Exit if program $1 is not found in PATH.
-check_program() {
-	if ! command -v "${1}" > /dev/null 2>&1; then
-		echo "'${1}' not found in PATH" >&2
-		exit 1
-	fi
-}
-
-# Check that we were spawned with two arguments and that these arguments are two
-# different directories.
-check_args() {
-	if [ ${#} -ne 2 ] || [ ! -d "${1}" ] || [ ! -d "${2}" ] || [ "${1}" = "${2}" ]; then
-		echo "Usage:"
-		echo ""
-		echo "  ${0} <TESTDIR> <REFDIR>"
-		echo ""
-		echo "Generate API compatibility reports for BIND libraries."
-		echo ""
-		echo "  <TESTDIR> is a directory with current (new) BIND version"
-		echo "  <REFDIR> is a directory with reference (old) BIND version"
-		exit 1
-	fi
-}
-
-check_args "${@}"
-TESTBIND="${1}"
-REFBIND="${2}"
-
-# Ensure the required tools are available in PATH.
-check_program abi-dumper
-check_program abi-compliance-checker
-check_program git
-check_program w3m
-
-# Find all libraries which have designated 'api' file and
-# generate ABI dump file for them.
-while read -r SO; do
-	APIFILE="$(dirname "${SO}")/../api"
-	APIFILE_DIR=$(dirname "${APIFILE}")
-	GIT_HEAD_REV=$(git -C "${APIFILE_DIR}" rev-parse HEAD | cut -c 1-10)
-	GIT_HEAD_UNIX_TIME=$(git -C "${APIFILE_DIR}" log -1 --format=%ct HEAD)
-	# Get LIBINTERFACE, LIBREVISION, LIBAGE from the 'api' file.
-	eval "$(grep -v "^#" "${APIFILE}" | tr -d " ")"
-	VERSION="${LIBINTERFACE}.${LIBREVISION}.${LIBAGE}-${GIT_HEAD_UNIX_TIME}-${GIT_HEAD_REV}"
-	abi-dumper "${SO}" -o abi-"$(basename "${SO}" .so)-${VERSION}".dump -lver "${VERSION}"
-done < <(find "${TESTBIND}"/lib/*/.libs/ "${REFBIND}"/lib/*/.libs/ -name '*.so' ! -name '*-nosymtbl*')
-
-# Generate HTML API compatibility reports for all libraries.
-find . -maxdepth 1 -name 'abi-*.dump' | sort | while read -r OLD; read -r NEW; do
-	SONAME=${OLD/.\/abi-/}
-	SONAME=${SONAME/-*/}
-	if abi-compliance-checker -l "${SONAME}" -old "${OLD}" -new "${NEW}"; then
-		REPORT_PREFIX="PASS"
-	else
-		echo "***** Compatibility problems detected"
-		REPORT_PREFIX="WARN"
-	fi
-	OLD_REPORT_PATH="$(find "compat_reports/${SONAME}" -name '*.html')"
-	NEW_REPORT_PATH="${REPORT_PREFIX}-${SONAME}.html"
-	mv "${OLD_REPORT_PATH}" "${NEW_REPORT_PATH}"
-	echo
-done
-
-# Generate TXT API compatibility reports from HTML reports for all BIND libraries.
-echo "Generate TXT API compatibility reports from HTML reports for all BIND libraries:"
-while read -r HTMLREPORT; do
-	TXTREPORT="${HTMLREPORT/.html/.txt}"
-	echo "  w3m: ${HTMLREPORT} -> ${TXTREPORT}"
-	w3m -dump -cols 75 -O ascii -T text/html "${HTMLREPORT}" > "${TXTREPORT}"
-done < <(find . -maxdepth 1 -name '*-lib*.html')
diff --git a/util/copyrights b/util/copyrights
index b17dd9d4f4..4898b95b77 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -1274,7 +1274,6 @@
 ./fuzz/isc_lex_gettoken.c			C	2020,2021
 ./fuzz/libfuzzer.sh				SH	2020,2021
 ./fuzz/main.c					C	2018,2019,2020,2021
-./lib/bind9/api					X	2001,2006,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021
 ./lib/bind9/check.c				C	2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021
 ./lib/bind9/getaddresses.c			C	2001,2002,2004,2005,2007,2014,2015,2016,2017,2018,2019,2020,2021
 ./lib/bind9/include/bind9/check.h		C	2001,2004,2005,2006,2007,2016,2018,2019,2020,2021
@@ -1286,7 +1285,6 @@
 ./lib/bind9/win32/libbind9.vcxproj.user		X	2013,2018,2019,2020,2021
 ./lib/dns/acl.c					C	1999,2000,2001,2002,2004,2005,2006,2007,2008,2009,2011,2013,2014,2016,2017,2018,2019,2020,2021
 ./lib/dns/adb.c					C	1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021
-./lib/dns/api					X	1999,2000,2001,2006,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021
 ./lib/dns/badcache.c				C	2014,2015,2016,2018,2019,2020,2021
 ./lib/dns/byaddr.c				C	2000,2001,2002,2003,2004,2005,2007,2009,2013,2016,2017,2018,2019,2020,2021
 ./lib/dns/cache.c				C	1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021
@@ -1742,7 +1740,6 @@
 ./lib/dns/zonekey.c				C	2001,2003,2004,2005,2007,2016,2018,2019,2020,2021
 ./lib/dns/zoneverify.c				C	2018,2019,2020,2021
 ./lib/dns/zt.c					C	1999,2000,2001,2002,2004,2005,2006,2007,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021
-./lib/irs/api					X	2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021
 ./lib/irs/include/irs/resconf.h			C	2009,2014,2016,2018,2019,2020,2021
 ./lib/irs/resconf.c				C	2009,2011,2012,2014,2015,2016,2017,2018,2019,2020,2021
 ./lib/irs/tests/resconf_test.c			C	2016,2018,2019,2020,2021
@@ -1770,7 +1767,6 @@
 ./lib/irs/win32/libirs.vcxproj.user		X	2014,2018,2019,2020,2021
 ./lib/irs/win32/resconf.c			C	2018,2019,2020,2021
 ./lib/isc/aes.c					C	2014,2016,2017,2018,2019,2020,2021
-./lib/isc/api					X	1999,2000,2001,2006,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021
 ./lib/isc/app.c					C	1999,2000,2001,2002,2003,2004,2005,2007,2008,2009,2013,2014,2015,2016,2017,2018,2019,2020,2021
 ./lib/isc/assertions.c				C	1997,1998,1999,2000,2001,2004,2005,2007,2008,2009,2015,2016,2018,2019,2020,2021
 ./lib/isc/astack.c				C	2019,2020,2021
@@ -2070,7 +2066,6 @@
 ./lib/isc/win32/unistd.h			C	2000,2001,2004,2007,2008,2009,2016,2018,2019,2020,2021
 ./lib/isc/win32/win32os.c			C	2002,2004,2007,2013,2014,2015,2016,2018,2019,2020,2021
 ./lib/isccc/alist.c				C.NOM	2001,2004,2005,2007,2015,2016,2018,2019,2020,2021
-./lib/isccc/api					X	2001,2006,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021
 ./lib/isccc/base64.c				C.NOM	2001,2004,2005,2007,2013,2016,2018,2019,2020,2021
 ./lib/isccc/cc.c				C.NOM	2001,2002,2003,2004,2005,2006,2007,2012,2013,2014,2015,2016,2018,2019,2020,2021
 ./lib/isccc/ccmsg.c				C.NOM	2001,2004,2005,2007,2016,2018,2019,2020,2021
@@ -2095,7 +2090,6 @@
 ./lib/isccc/win32/libisccc.vcxproj.in		X	2013,2014,2015,2016,2017,2018,2019,2020
 ./lib/isccc/win32/libisccc.vcxproj.user		X	2013,2018,2019,2020,2021
 ./lib/isccfg/aclconf.c				C	1999,2000,2001,2002,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021
-./lib/isccfg/api				X	2001,2006,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021
 ./lib/isccfg/dnsconf.c				C	2009,2016,2018,2019,2020,2021
 ./lib/isccfg/include/isccfg/aclconf.h		C	1999,2000,2001,2004,2005,2006,2007,2010,2011,2012,2013,2014,2016,2018,2019,2020,2021
 ./lib/isccfg/include/isccfg/cfg.h		C	2000,2001,2002,2004,2005,2006,2007,2010,2013,2014,2015,2016,2018,2019,2020,2021
@@ -2114,7 +2108,6 @@
 ./lib/isccfg/win32/libisccfg.vcxproj.filters.in	X	2013,2014,2015,2016,2018,2019,2020
 ./lib/isccfg/win32/libisccfg.vcxproj.in		X	2013,2014,2015,2016,2017,2018,2019,2020
 ./lib/isccfg/win32/libisccfg.vcxproj.user	X	2013,2018,2019,2020,2021
-./lib/ns/api					X	2017,2018,2019,2020,2021
 ./lib/ns/client.c				C	2017,2018,2019,2020,2021
 ./lib/ns/hooks.c				C	2018,2019,2020,2021
 ./lib/ns/include/ns/client.h			C	2017,2018,2019,2020,2021
@@ -2188,7 +2181,6 @@
 ./util/COPYRIGHT.NOM				X	2001,2004,2007,2016,2018,2019,2020,2021
 ./util/COPYRIGHT.PORTION			X	1996,1997,1998,1999,2000,2001,2004,2007,2016,2018,2019,2020,2021
 ./util/COPYRIGHT.TOP				X	2018,2019,2020,2021
-./util/api-checker.sh				SH	2020,2021
 ./util/bindkeys.pl				PERL	2009,2010,2011,2012,2014,2016,2017,2018,2019,2020,2021
 ./util/branchsync.sh				SH	2013,2016,2018,2019,2020,2021
 ./util/check-categories.sh			SH	2015,2016,2017,2018,2019,2020,2021