Remove the --no-error-notification flag.

pkg/analysis_server/test/integration/integration_test_methods.dart

 // Copyright (c) 2014, 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.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
 // "pkg/analysis_server/tool/spec/generate_files".
 
 /**
  * Convenience methods for running integration tests
@@ skipping 590 matching lines @@
   /**
    * Stream controller for [onAnalysisAnalyzedFiles].
    */
   StreamController<AnalysisAnalyzedFilesParams> _onAnalysisAnalyzedFiles;
 
   /**
    * Reports the errors associated with a given file. The set of errors
    * included in the notification is always a complete list that supersedes any
    * previously reported errors.
    *
-   * It is only possible to unsubscribe from this notification by using the
-   * command-line flag --no-error-notification.
-   *
    * Parameters
    *
    * file (FilePath)
    *
    *   The file containing the errors.
    *
    * errors (List<AnalysisError>)
    *
    *   The errors contained in the file.
    */
@@ skipping 1137 matching lines @@
       case "execution.launchData":
         outOfTestExpect(params, isExecutionLaunchDataParams);
         _onExecutionLaunchData.add(new ExecutionLaunchDataParams.fromJson(decoder, 'params', params));
         break;
       default:
         fail('Unexpected notification: $event');
         break;
     }
   }
 }