Remove remnant Kyua references

Unit tests were ported from Kyua to Automake.  All references to Kyua
thus should be removed from the main branch.

.gitignore

@@ -56,7 +56,6 @@ Makefile
 Makefile.in
 ans.run
 gen.dSYM/
-kyua.log
 named.memstats
 named.run
 timestamp

.gitlab-ci.yml

@@ -8,9 +8,6 @@ variables:
   CCACHE_DIR: "/ccache"
   SOFTHSM2_CONF: "/var/tmp/softhsm2/softhsm2.conf"
 
-  # VirtualBox driver needs to set build_dir to "/builds" in gitlab-runner.toml
-  KYUA_RESULT: "$CI_PROJECT_DIR/kyua.results"
-
   GIT_DEPTH: 1
   BUILD_PARALLEL_JOBS: 6
   TEST_PARALLEL_JOBS: 6
@@ -344,13 +341,6 @@ stages:
     untracked: true
     when: on_failure
 
-.kyua_report: &kyua_report_html |
-  kyua --logfile /dev/null report-html \
-       --force \
-       --results-file "$KYUA_RESULT" \
-       --results-filter "" \
-       --output kyua_html
-
 .windows_system_test: &windows_system_test_job
   stage: system
   script: