Remove dpkg trigger on old immodules search path

GTK 3 hasn't searched this path since 2015, so it was no longer useful
to have a trigger on it.

debian/libgtk-3-0.postinst.in

@@ -2,7 +2,6 @@
 set -e
 
 IMMODULES_DIR=/@MODULES_BASE_PATH@/immodules
-IMMODULES_DIR_OLD=/@OLD_MODULES_BASE_PATH@/immodules
 
 if [ "$1" = triggered ]; then
     # This is triggered everytime an application installs a
@@ -14,7 +13,7 @@ fi
 #DEBHELPER#
 
 # Also handle the initial installation
-if [ -d $IMMODULES_DIR ] || [ -d $IMMODULES_DIR_OLD ]; then
+if [ -d "$IMMODULES_DIR" ]; then
      /@LIBDIR@/@SHARED_PKG@/gtk-query-immodules-3.0 --update-cache || true
 fi
 

debian/libgtk-3-0.triggers.in

@@ -1,2 +1 @@
 interest-noawait /@MODULES_BASE_PATH@/immodules
-interest-noawait /@OLD_MODULES_BASE_PATH@/immodules

debian/rules

@@ -30,7 +30,6 @@ CONFDIR := etc/gtk-3.0
 
 # relative base directory for all types of modules
 MODULES_BASE_PATH := $(LIBDIR)/gtk-3.0/$(GTK_BINARY_VERSION)
-OLD_MODULES_BASE_PATH := usr/lib/gtk-3.0/$(GTK_BINARY_VERSION)
 
 # package names
 SHARED_PKG := libgtk-$(APIVER)-$(SONAME)
@@ -81,7 +80,6 @@ debian/%: debian/%.in
 		-e "s#@LIBDIR@#$(LIBDIR)#g" \
 		-e 's#@CONFDIR@#$(CONFDIR)#g' \
 		-e "s#@MODULES_BASE_PATH@#$(MODULES_BASE_PATH)#g" \
-		-e "s#@OLD_MODULES_BASE_PATH@#$(OLD_MODULES_BASE_PATH)#g" \
 		-e "s#@NEWS@#$(NEWS)#g" \
 		-e "s#@README@#$(README)#g" \
 		$@.in > $@