widget-factory: Remove libcanberra support

GTK cannot depend on libcanberra-gtk which depends on GTK. This causes
a circular dependency and is especially neat if installed GTK is
different enough from uninstalled GTK.

demos/widget-factory/Makefile.am

@@ -19,13 +19,13 @@ gtk3_widget_factory_CPPFLAGS = 		\
 	-I$(top_srcdir)			\
 	$(GTK_DEBUG_FLAGS)		\
 	$(GTK_DEP_CFLAGS)		\
-	$(LIBCANBERRA_CFLAGS)
+	$(NULL)
 
 gtk3_widget_factory_LDADD = 		\
 	$(top_builddir)/gdk/libgdk-3.la \
 	$(top_builddir)/gtk/libgtk-3.la \
 	$(GTK_DEP_LIBS)			\
-	$(LIBCANBERRA_LIBS)
+	$(NULL)
 
 widget_factory_resources.c: widget-factory.gresource.xml $(shell $(GLIB_COMPILE_RESOURCES) --sourcedir=$(srcdir) --generate-dependencies $(srcdir)/widget-factory.gresource.xml)
 	$(AM_V_GEN) $(GLIB_COMPILE_RESOURCES) --target=$@ --sourcedir=$(srcdir) --generate-source $<