[gtk+] reftests: Remove unused argument from function

[Benjamin Otte <otte src gnome org>]

commit 01fe1282fc71ae4ef65e9c4a70ce8224e09de7fa
Author: Benjamin Otte <otte redhat com>
Date:   Mon Mar 3 14:21:02 2014 +0100

    reftests: Remove unused argument from function

 testsuite/reftests/gtk-reftest.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/testsuite/reftests/gtk-reftest.c b/testsuite/reftests/gtk-reftest.c
index 19918a0..3cb8d0c 100644
--- a/testsuite/reftests/gtk-reftest.c
+++ b/testsuite/reftests/gtk-reftest.c
@@ -446,8 +446,7 @@ buffer_diff_core (const guchar *buf_a,
 }
 
 static cairo_surface_t *
-compare_surfaces (const char *test_file,
-                  cairo_surface_t *surface1,
+compare_surfaces (cairo_surface_t *surface1,
                   cairo_surface_t *surface2)
 {
   int w1, h1, w2, h2, w, h;
@@ -493,7 +492,7 @@ test_ui_file (GFile *file)
     }
   g_free (reference_file);
 
-  diff_image = compare_surfaces (ui_file, ui_image, reference_image);
+  diff_image = compare_surfaces (ui_image, reference_image);
 
   save_image (ui_image, ui_file, ".out.png");
   save_image (reference_image, ui_file, ".ref.png");