Revert "extensions: add connlabel match" duplicate

This reverts commit ca376fcbe51b9a102a490545957d5fee69e253e1
to get rid of the duplicated install-data-hook.

This should get the tree back into the right state.

Conflicts:
	Makefile.am
diff --git a/Makefile.am b/Makefile.am
index 931c565..cd008a1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -28,9 +28,5 @@
 	@mkdir -p -m 755 $(DESTDIR)/etc/xtables/ || :
 	@test -f /etc/xtables/connlabel.conf || $(INSTALL) -m 644 etc/xtables/connlabel.conf $(DESTDIR)/etc/xtables/connlabel.conf || :
 
-install-data-hook:
-	@mkdir -p -m 755 $(DESTDIR)/etc/xtables/ || :
-	@test -f /etc/xtables/connlabel.conf || $(INSTALL) -m 644 etc/xtables/connlabel.conf $(DESTDIR)/etc/xtables/connlabel.conf || :
-
 config.status: extensions/GNUmakefile.in \
 	include/xtables-version.h.in include/iptables/internal.h.in