[gtk-doc] Remove hack for deleting tmpl/

This was introduced in 029f46bde7e39094d3decb46525e91a97c5cc02c
and was in fact a bug in gtk-doc master:

  https://bugzilla.gnome.org/show_bug.cgi?id=707426

diff --git a/docs/reference/Makefile.am b/docs/reference/Makefile.am
index f5309ee..7817648 100644 (file)
--- a/docs/reference/Makefile.am
+++ b/docs/reference/Makefile.am
@@ -109,9 +109,4 @@ TESTS_ENVIRONMENT = cd $(srcdir) && \
 #TESTS = $(GTKDOC_CHECK)
 endif
 
-maintainer-clean-local: maintainer-clean-tmpl
-
-maintainer-clean-tmpl:
-       -rm -rf $(srcdir)/tmpl
-
 -include $(top_srcdir)/git.mk