build: Remove maintainer-clean rule

The maintainer-clean files list is horribly out of date, nobody is
maintaining it, and it's honestly easier to use `git clean -xdf`
instead to clean untracked files.

diff --git a/Makefile.am b/Makefile.am
index 3293226..7246923 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -20,16 +20,7 @@ DISTCLEANFILES =
 
 DISTCHECK_CONFIGURE_FLAGS = --enable-gtk-doc --enable-maintainer-flags --enable-docs
 
-# Extra clean files so that maintainer-clean removes *everything*
-MAINTAINERCLEANFILES =         \
-       aclocal.m4      \
-       config.guess    \
-       config.h.in     \
-        configure      \
-       gtk-doc.make    \
-       Makefile.in     \
-       $(NULL)
-
+# .release requires .changelog rules
 include $(top_srcdir)/build/autotools/Makefile.am.changelog
 include $(top_srcdir)/build/autotools/Makefile.am.release