build: Remove unused UA_LIBS variable

debian/changelog

@@ -72,6 +72,7 @@ dpkg (1.18.5) UNRELEASED; urgency=medium
       Base on a patch by Daniel Dehennin <daniel.dehennin@baby-gnu.org>.
   * Build system:
     - Fix building development documentation.
+    - Remove unused UA_LIBS variable.
   * Test suite:
     - Add a unit test to compile perl code with warnings.
     - Add a unit test for the trigger deferred parser.

utils/Makefile.am

@@ -32,7 +32,7 @@ update_alternatives_CPPFLAGS = \
 update_alternatives_LDADD = \
 	../lib/compat/libcompat.la \
 	$(LIBINTL) \
-	$(UA_LIBS)
+	$(nil)
 
 sbin_PROGRAMS =