[gtk+] Remove accidental commit that broke gtk3-demo

[Alexander Larsson <alexl src gnome org>]

commit 9d659d8a77095fd8a0d273520d2ae3fab19eb9ad
Author: Alexander Larsson <alexl redhat com>
Date:   Tue Jan 29 11:55:05 2013 +0100

    Remove accidental commit that broke gtk3-demo
    
    A piece of test code accidentally snuck into a commit that
    made gtk3-demo not find its data files, this patch just
    reverts that change.

 demos/gtk-demo/main.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
---
diff --git a/demos/gtk-demo/main.c b/demos/gtk-demo/main.c
index 1c04a27..935b86e 100644
--- a/demos/gtk-demo/main.c
+++ b/demos/gtk-demo/main.c
@@ -56,9 +56,6 @@ get_democodedir (void)
 
 #endif
 
-#undef DEMOCODEDIR
-#define DEMOCODEDIR getenv ("GTK_DEMO_DATA_DIR")
-
 /**
  * demo_find_file:
  * @base: base filename