Deduplicate includes

Change-Id: I16a77d0701b42bcf9d751834f0eae4decedd9176
Reviewed-on: https://gerrit.libreoffice.org/50858
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

sal/osl/unx/file_volume.cxx

@@ -141,8 +141,6 @@ oslFileError osl_getVolumeInformation( rtl_uString* ustrDirectoryURL, oslVolumeI
 
 #if defined(NETBSD)
 
-#include <sys/param.h>
-
 #   define OSL_detail_STATFS_STRUCT              struct statvfs
 #   define OSL_detail_STATFS(dir, sfs)           statvfs((dir), (sfs))
 #   define OSL_detail_STATFS_ISREMOTE(a)         (((a).f_flag & ST_LOCAL) == 0)

soltools/mkdepend/def.h

@@ -142,7 +142,6 @@ struct filepointer {
 };
 
 #ifndef X_NOT_STDC_ENV
-#include <stdlib.h>
 #if defined(macII) && !defined(__STDC__)  /* stdlib.h fails to define these */
 char *malloc(), *realloc();
 #endif /* macII */