Delete all test isolate file.

ui/accessibility/accessibility_unittests.isolate

Index: ui/accessibility/accessibility_unittests.isolate
diff --git a/ui/accessibility/accessibility_unittests.isolate b/ui/accessibility/accessibility_unittests.isolate
deleted file mode 100644
index b2a7119a4214c3f9c2427d7866421445c287a754..0000000000000000000000000000000000000000
--- a/ui/accessibility/accessibility_unittests.isolate
+++ /dev/null
@@ -1,17 +0,0 @@
-# Copyright (c) 2014 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.
-{
-  'conditions': [
-    ['OS=="linux" or OS=="mac" or OS=="win"', {
-      'variables': {
-        'command': [
-          '<(PRODUCT_DIR)/accessibility_unittests<(EXECUTABLE_SUFFIX)',
-        ],
-      },
-    }],
-  ],
-  'includes': [
-    '../../base/base.isolate',
-  ],
-}