Problem: unused Debian/kFreeBSD-specific code

Solution: delete it

Makefile.am

@@ -301,15 +301,9 @@ src_libzmq_la_LDFLAGS = \
 	-version-info @LTVER@ \
 	@LIBZMQ_EXTRA_LDFLAGS@
 else
-if ON_DEBIAN_KFREEBSD
 src_libzmq_la_LDFLAGS = \
 	-version-info @LTVER@ \
 	@LIBZMQ_EXTRA_LDFLAGS@
-else
-src_libzmq_la_LDFLAGS = \
-	-version-info @LTVER@ \
-	@LIBZMQ_EXTRA_LDFLAGS@
-endif
 endif
 endif
 endif

configure.ac

@@ -167,7 +167,6 @@ libzmq_on_cygwin="no"
 libzmq_on_android="no"
 libzmq_on_linux="no"
 libzmq_on_gnu="no"
-libzmq_on_debian_kfreebsd="no"
 
 # Set some default features required by ZeroMQ code
 CPPFLAGS="-D_REENTRANT -D_THREAD_SAFE $CPPFLAGS"
@@ -222,12 +221,6 @@ case "${host_os}" in
         ;;
     *freebsd*)
         # Define on FreeBSD to enable all library features
-        case "${host_os}" in
-            # On Debian/kFreeBSD with gnu set the --version-script flag
-            kfreebsd*-gnu*)
-                libzmq_on_debian_kfreebsd="yes"
-            ;;
-        esac
         CPPFLAGS="-D__BSD_VISIBLE $CPPFLAGS"
         AC_DEFINE(ZMQ_HAVE_FREEBSD, 1, [Have FreeBSD OS])
         ;;
@@ -633,7 +626,6 @@ AM_CONDITIONAL(ON_CYGWIN, test "x$libzmq_on_cygwin" = "xyes")
 AM_CONDITIONAL(ON_ANDROID, test "x$libzmq_on_android" = "xyes")
 AM_CONDITIONAL(ON_LINUX, test "x$libzmq_on_linux" = "xyes")
 AM_CONDITIONAL(ON_GNU, test "x$libzmq_on_gnu" = "xyes")
-AM_CONDITIONAL(ON_DEBIAN_KFREEBSD, test "x$libzmq_on_debian_kfreebsd" = "xyes")
 
 # Check for __atomic_Xxx compiler intrinsics
 AC_LANG_PUSH([C++])