Revert of Convert ipc_mojo_unittests to run exclusively on Swarming

ipc/mojo/ipc_mojo.gyp

 # Copyright 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
   ],
@@ skipping 88 matching lines @@
       'include_dirs': [
         '..'
       ],
       'sources': [
         'ipc_mojo_perftest.cc',
       ],
       'conditions': [
       ],
     },
   ],
-  'conditions': [
-    ['test_isolation_mode != "noop"', {
-      'targets': [
-        {
-          'target_name': 'ipc_mojo_unittests_run',
-          'type': 'none',
-          'dependencies': [
-            'ipc_mojo_unittests',
-          ],
-          'includes': [ '../../build/isolate.gypi' ],
-          'sources': [ 'ipc_mojo_unittests.isolate' ],
-        },
-      ],
-    }],
-  ],
 }