Delete breakpad_unittest.isolate (no longer needed)

breakpad/breakpad_unittests_apk.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': [
     '../build/android/android.isolate',
-    'breakpad_unittests.isolate',
   ],
   'variables': {
     'command': [
       '<(PRODUCT_DIR)/bin/run_breakpad_unittests',
       '--logcat-output-dir', '${ISOLATED_OUTDIR}/logcats',
     ],
     'files': [
       '<(PRODUCT_DIR)/bin/run_breakpad_unittests',
       '<(PRODUCT_DIR)/breakpad_unittests',
-      'breakpad_unittests.isolate',
     ]
   },
 }