Revert of Fix pylint warnings in webkitpy/common/.

third_party/WebKit/Tools/Scripts/webkitpy/common/system/filesystem_unittest.py

 # vim: set fileencoding=utf-8 :
 # Copyright (C) 2010 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #    * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #    * Redistributions in binary form must reproduce the above
@@ skipping 243 matching lines @@
             if os.path.exists(sub_dir):
                 os.rmdir(sub_dir)
 
     def test_read_and_write_text_file(self):
         fs = FileSystem()
         text_path = None
 
         unicode_text_string = u'\u016An\u012Dc\u014Dde\u033D'
         try:
             text_path = tempfile.mktemp(prefix='tree_unittest_')
-            out_file = fs.open_text_file_for_writing(text_path)
-            out_file.write(unicode_text_string)
-            out_file.close()
+            file = fs.open_text_file_for_writing(text_path)
+            file.write(unicode_text_string)
+            file.close()
 
-            in_file = fs.open_text_file_for_reading(text_path)
-            read_text = in_file.read()
-            in_file.close()
+            file = fs.open_text_file_for_reading(text_path)
+            read_text = file.read()
+            file.close()
 
             self.assertEqual(read_text, unicode_text_string)
         finally:
             if text_path and fs.isfile(text_path):
                 os.remove(text_path)
 
     def test_read_and_write_file(self):
         fs = FileSystem()
         text_path = None
         binary_path = None
@@ skipping 24 matching lines @@
         fs = FileSystem()
         self.assertRaises(IOError, fs.read_text_file, self._missing_file)
 
     def test_remove_file_with_retry(self):
         RealFileSystemTest._remove_failures = 2
 
         def remove_with_exception(filename):
             RealFileSystemTest._remove_failures -= 1
             if RealFileSystemTest._remove_failures >= 0:
                 try:
-                    raise WindowsError  # pylint: disable=undefined-variable
+                    raise WindowsError
                 except NameError:
                     raise FileSystem._WindowsError
 
         fs = FileSystem()
         self.assertTrue(fs.remove('filename', remove_with_exception))
         self.assertEqual(-1, RealFileSystemTest._remove_failures)
 
     def test_sep(self):
         fs = FileSystem()
 
         self.assertEqual(fs.sep, os.sep)
         self.assertEqual(fs.join("foo", "bar"),
                          os.path.join("foo", "bar"))