Fix python scripts in src/tools/

tools/site_compare/operators/equals_with_mask.py

Index: tools/site_compare/operators/equals_with_mask.py
diff --git a/tools/site_compare/operators/equals_with_mask.py b/tools/site_compare/operators/equals_with_mask.py
index d6abd535dcf0850d9e31fd5f6d8145e0c6089027..e42f7e16a91e31dd5fd6de748af24f6852f66ee7 100644
--- a/tools/site_compare/operators/equals_with_mask.py
+++ b/tools/site_compare/operators/equals_with_mask.py
@@ -1,5 +1,4 @@
-#!/usr/bin/python2.4
-# Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+# Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
@@ -56,6 +55,3 @@ def Compare(file1, file2, **kwargs):
     return ("The images differ", diff)
   else:
     return None
-
-
-