[ostree] core: Drop a leftover unnecessary #define _GNU_SOURCE

[Colin Walters <walters src gnome org>]

commit 87245652917151dad17bf1e29b12d0b0fcf0c03f
Author: Colin Walters <walters verbum org>
Date:   Tue Jul 16 09:22:42 2013 -0400

    core: Drop a leftover unnecessary #define _GNU_SOURCE
    
    We now use AC_USE_SYSTEM_EXTENSIONS.

 src/libostree/ostree-repo.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/src/libostree/ostree-repo.c b/src/libostree/ostree-repo.c
index bd89197..b9697c7 100644
--- a/src/libostree/ostree-repo.c
+++ b/src/libostree/ostree-repo.c
@@ -20,8 +20,6 @@
  * Author: Colin Walters <walters verbum org>
  */
 
-#define _GNU_SOURCE
-
 #include "config.h"
 
 #include "ostree-repo-private.h"