Remove support for legacy wpr_server in Telemetry

telemetry/telemetry/testing/serially_executed_browser_test_case.py

 # Copyright 2016 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.
 
 import inspect
 import logging
 import re
 import unittest
 
 from py_utils import cloud_storage
@@ skipping 73 matching lines @@
       archive_path: Path to the WPR file. If there is a corresponding sha1 file,
           this archive will be automatically downloaded from Google Storage.
       archive_bucket: The bucket to look for the WPR archive.
     """
     assert cls._browser_options, (
         'Browser options must be set with |SetBrowserOptions| prior to '
         'starting WPR')
     assert not cls.browser, 'WPR must be started prior to browser being started'
 
     cloud_storage.GetIfChanged(archive_path, archive_bucket)
-    use_wpr_go = archive_path.endswith('.wprgo')
-    cls.platform.network_controller.Open(wpr_modes.WPR_REPLAY, [],
-                                         use_wpr_go=use_wpr_go)
+    cls.platform.network_controller.Open(wpr_modes.WPR_REPLAY, [])
     cls.platform.network_controller.StartReplay(archive_path=archive_path)
 
   @classmethod
   def StopWPRServer(cls):
     cls.platform.network_controller.StopReplay()
 
   @classmethod
   def StartBrowser(cls):
     assert cls._browser_options, (
         'Browser options must be set with |SetBrowserOptions| prior to '
@@ skipping 114 matching lines @@
       assert hasattr(test_class, based_method_name), (
           '%s is specified but based method %s does not exist' %
           (name, based_method_name))
       based_method = getattr(test_class, based_method_name)
       for generated_test_name, args in method(finder_options):
         _ValidateTestMethodname(generated_test_name)
         setattr(test_class, generated_test_name, _GenerateTestMethod(
             based_method, args))
         test_cases.append(test_class(generated_test_name))
   return test_cases