Delete all_page_actions, which is now empty.

content/test/gpu/gpu_tests/webgl_robustness.py

 # Copyright 2013 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.
 from telemetry import benchmark
 from telemetry.page import page
 from telemetry.page import page_set
 from telemetry.page import page_test
-# pylint: disable=W0401,W0614
-from telemetry.page.actions.all_page_actions import *
 
 from webgl_conformance import WebglConformanceValidator
 from webgl_conformance import conformance_harness_script
 from webgl_conformance import conformance_path
 
 
 robustness_harness_script = conformance_harness_script + r"""
   var robustnessTestHarness = {};
   robustnessTestHarness._contextLost = false;
   robustnessTestHarness.initialize = function() {
@@ skipping 43 matching lines @@
 class WebglRobustness(benchmark.Benchmark):
   test = WebglConformanceValidator
 
   def CreatePageSet(self, options):
     ps = page_set.PageSet(
       file_path=conformance_path,
       user_agent_type='desktop',
       serving_dirs=[''])
     ps.AddPage(WebglRobustnessPage(ps, ps.base_dir))
     return ps