Revert of Linux sandbox: add sandbox_linux_unittests.isolate

sandbox/linux/sandbox_linux.gypi

 # Copyright (c) 2012 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': {
     'conditions': [
       ['OS=="linux"', {
         'compile_suid_client': 1,
         'compile_credentials': 1,
@@ skipping 326 matching lines @@
         'variables': {
           'test_suite_name': 'sandbox_linux_jni_unittests',
         },
         'dependencies': [
           'sandbox_linux_jni_unittests',
         ],
         'includes': [ '../../build/apk_test.gypi' ],
         }
       ],
     }],
-    ['test_isolation_mode != "noop"', {
-      'targets': [
-        {
-          'target_name': 'sandbox_linux_unittests_run',
-          'type': 'none',
-          'dependencies': [
-            'sandbox_linux_unittests',
-          ],
-          'includes': [
-            '../../build/isolate.gypi',
-            'sandbox_linux_unittests.isolate',
-          ],
-          'sources': [
-            'sandbox_linux_unittests.isolate',
-          ],
-        },
-      ],
-    }],
   ],
 }