Delete all test isolate file.

testing/chromoting/multi_machine_example/example_test_controller.isolate

-# Copyright 2015 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.
-
-{
-  'includes': [
-    '../../legion/legion.isolate',
-  ],
-  'variables': {
-    'command': [
-      'python',
-      'example_test_controller.py',
-      '--commands_file',
-      '../browser_test_commands_linux.txt',
-      '--prod_dir',
-      '<(PRODUCT_DIR)',
-      '--cfg_file',
-      '../../../remoting/tools/internal/test-account-host-config.json',
-      '--me2me_manifest_file',
-      '<(PRODUCT_DIR)/remoting/com.google.chrome.remote_desktop.json',
-      '--it2me_manifest_file',
-      '<(PRODUCT_DIR)/remoting/com.google.chrome.remote_assistance.json',
-      '--user_profile_dir',
-      '/tmp/chromoting_test_profile',
-    ],
-    'files': [
-      'example_test_controller.py',
-      '../../../tools/swarming_client/',
-    ],
-  },
-}