Remove the --no-error-notification flag.

pkg/analysis_server/lib/src/server/driver.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.
 
 library driver;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:math';
 
@@ skipping 259 matching lines @@
    * console instead of being intercepted.
    */
   static const String INTERNAL_PRINT_TO_CONSOLE = "internal-print-to-console";
 
   /**
    * The name of the option used to describe the new analysis driver logger.
    */
   static const String NEW_ANALYSIS_DRIVER_LOG = 'new-analysis-driver-log';
 
   /**
-   * The name of the flag used to disable error notifications.
-   */
-  static const String NO_ERROR_NOTIFICATION = "no-error-notification";
-
-  /**
    * The name of the flag used to disable the index.
    */
   static const String NO_INDEX = "no-index";
 
   /**
    * The name of the flag used to enable version 2 of semantic highlight
    * notification.
    */
   static const String USE_ANALISYS_HIGHLIGHT2 = "useAnalysisHighlight2";
 
@@ skipping 91 matching lines @@
 
     AnalysisServerOptions analysisServerOptions = new AnalysisServerOptions();
     analysisServerOptions.enableIncrementalResolutionApi =
         results[ENABLE_INCREMENTAL_RESOLUTION_API];
     analysisServerOptions.enableIncrementalResolutionValidation =
         results[INCREMENTAL_RESOLUTION_VALIDATION];
     analysisServerOptions.enableNewAnalysisDriver =
         !results[DISABLE_NEW_ANALYSIS_DRIVER];
     analysisServerOptions.finerGrainedInvalidation =
         results[FINER_GRAINED_INVALIDATION];
-    analysisServerOptions.noErrorNotification = results[NO_ERROR_NOTIFICATION];
     analysisServerOptions.noIndex = results[NO_INDEX];
     analysisServerOptions.useAnalysisHighlight2 =
         results[USE_ANALISYS_HIGHLIGHT2];
     analysisServerOptions.fileReadMode = results[FILE_READ_MODE];
     analysisServerOptions.newAnalysisDriverLog =
         results[NEW_ANALYSIS_DRIVER_LOG];
 
     _initIncrementalLogger(results[INCREMENTAL_RESOLUTION_LOG]);
 
     //
@@ skipping 155 matching lines @@
         help: "enable sending `print` output to the console",
         defaultsTo: false,
         negatable: false);
     parser.addOption(NEW_ANALYSIS_DRIVER_LOG,
         help: "set a destination for the new analysis driver's log");
     parser.addOption(PORT_OPTION,
         help: "the http diagnostic port on which the server provides"
             " status and performance information");
     parser.addOption(INTERNAL_DELAY_FREQUENCY);
     parser.addOption(SDK_OPTION, help: "[path] the path to the sdk");
-    parser.addFlag(NO_ERROR_NOTIFICATION,
-        help: "disable sending all analysis error notifications to the server",
-        defaultsTo: false,
-        negatable: false);
     parser.addFlag(NO_INDEX,
         help: "disable indexing sources", defaultsTo: false, negatable: false);
     parser.addFlag(USE_ANALISYS_HIGHLIGHT2,
         help: "enable version 2 of semantic highlight",
         defaultsTo: false,
         negatable: false);
     parser.addOption(FILE_READ_MODE,
         help: "an option of the ways files can be read from disk, " +
             "some clients normalize end of line characters which would make " +
             "the file offset and range information incorrect.",
@@ skipping 84 matching lines @@
 
   _DiagnosticServerImpl();
 
   Future startOnPort(int port) {
     return httpServer.serveHttp(port);
   }
 
   @override
   Future<int> getServerPort() => httpServer.serveHttp();
 }