Remove unnecessary option.

dart/utils/compiler/compiler.gyp

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'variables': {
     'dart_dir': '../..',
   },
   'targets': [
     {
@@ skipping 39 matching lines @@
             '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)gen_snapshot<(EXECUTABLE_SUFFIX)',
             '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)dart<(EXECUTABLE_SUFFIX)',
             '../../sdk/lib/_internal/libraries.dart',
             '<!@(["python", "../../tools/list_files.py", "\\.dart$", "../../sdk/lib/_internal/compiler", "../../runtime/lib"])',
           ],
           'outputs': [
             '<(PRODUCT_DIR)/dart2js.snapshot',
           ],
           'action': [
             '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)gen_snapshot<(EXECUTABLE_SUFFIX)',
-
-            # TODO(ahe): Remove option when http://dartbug.com/5989 is fixed.
-            '--optimization_counter_threshold=-1',
-
             # Note: we don't store the snapshot in the location where
             # the dart2js script is looking for it.  The motivation
             # for that is to support an incremental development model
             # for dart2js compiler engineers.  However, we install the
             # snapshot in the proper location when building the SDK.
             '--script_snapshot=<(PRODUCT_DIR)/dart2js.snapshot',
             '../../sdk/lib/_internal/compiler/implementation/dart2js.dart',
           ],
         },
       ],
     },
   ],
 }