build: Remove two dead recipes from Makefile.in.

In commit f5fb7ab5 we switched from skencil to dia for creating the
overview.pdf file.  This commit missed to remove the Make recipes
for creating the pdf file from the skencil sources. Remove it now.

diff --git a/Makefile.in b/Makefile.in
index cf8b9f7..bcc19a0 100644 (file)
--- a/Makefile.in
+++ b/Makefile.in
@@ -329,9 +329,4 @@ $(tarball):
        bzip2 -9 $(tarball_pfx).tar
        ls -l $(tarball_pfx).tar.bz2
        rm -rf $(tarball_pfx)
-%.ps: %.sk
-       sk2ps $< > $@
-%.pdf: %.ps
-       ps2pdf - - < $< > $@
-
 include $(test_dir)/makefile.test