[libgd] Don't include git.mk in makefile

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 1f2e07409cf085b74370f8a985de849d0f6d4b57
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun Aug 7 21:57:46 2016 -0500

    Don't include git.mk in makefile
    
    We have a .gitignore committed into version control, so we shouldn't be
    overwriting it. This defeats the purpose of using git.mk as we wind up
    with a dirty subproject after every build due to make rewriting our
    tracked .gitignore. And libgd itself does not use git.mk, so it
    shouldn't be here.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=769616

 Makefile.am |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index ae39b33..21f3b08 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -277,5 +277,3 @@ noinst_DATA += $(VAPIS)
 EXTRA_DIST += $(VAPIS)
 MAINTAINERCLEANFILES += $(VAPIS)
 endif
-
--include $(top_srcdir)/git.mk