[gtk+] docs: Drop reference to refcounting.txt to fix make dist

[Rico Tzschichholz <ricotz src gnome org>]

commit 68025551e13eebcd8c610b104d309494a3aa973d
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sat Jul 20 13:03:59 2013 +0200

    docs: Drop reference to refcounting.txt to fix make dist
    
    In addition to 94d6971ca4e7e6acb066a042c7e0815b63d13b82

 docs/Makefile.am |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/docs/Makefile.am b/docs/Makefile.am
index 5b698be..be66356 100644
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -10,7 +10,6 @@ EXTRA_DIST += \
        focus_tracking.txt              \
        gtkdocs_fix                     \
        make-todo                       \
-       refcounting.txt                 \
        RELEASE-HOWTO                   \
        sizing-test.txt                 \
        styles.txt                      \