Remove remaining unused imports in webkitpy.

third_party/WebKit/Tools/Scripts/webkitpy/bindings/bindings_tests.py

 # Copyright (C) 2011 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:
 # 1. Redistributions of source code must retain the above copyright
 #    notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
 #    documentation and/or other materials provided with the distribution.
@@ skipping 36 matching lines @@
 from code_generator_web_module import CodeGeneratorWebModule
 from compute_interfaces_info_individual import InterfaceInfoCollector
 from compute_interfaces_info_overall import (compute_interfaces_info_overall,
                                              interfaces_info)
 from idl_compiler import (generate_bindings,
                           generate_union_type_containers,
                           generate_dictionary_impl,
                           generate_callback_function_impl)
 from utilities import ComponentInfoProviderCore
 from utilities import ComponentInfoProviderModules
-from utilities import write_file
 
 
 PASS_MESSAGE = 'All tests PASS!'
 FAIL_MESSAGE = """Some tests FAIL!
 To update the reference files, execute:
     run-bindings-tests --reset-results
 
 If the failures are not due to your changes, test results may be out of sync;
 please rebaseline them in a separate CL, after checking that tests fail in ToT.
 In CL, please set:
@@ skipping 309 matching lines @@
 
 
 def run_bindings_tests(reset_results, verbose):
     # Generate output into the reference directory if resetting results, or
     # a temp directory if not.
     if reset_results:
         print 'Resetting results'
         return bindings_tests(reference_directory, verbose)
     with TemporaryDirectory() as temp_dir:
         return bindings_tests(temp_dir, verbose)