Remove the unused operations queue

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.
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:math';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/plugin/server_plugin.dart';
@@ skipping 232 matching lines @@
   /**
    * The name of the option used to cause instrumentation to also be written to
    * a local file.
    */
   static const String INSTRUMENTATION_LOG_FILE = "instrumentation-log-file";
 
   /**
    * The name of the option used to specify if [print] should print to the
    * console instead of being intercepted.
    */
-  static const String INTERNAL_DELAY_FREQUENCY = 'internal-delay-frequency';
-
-  /**
-   * The name of the option used to specify if [print] should print to the
-   * 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 option used to enable verbose Flutter completion code generation.
    */
@@ skipping 65 matching lines @@
    * angular plugin until the official plugin API is finished.
    */
   AnalysisServer start(List<String> arguments) {
     CommandLineParser parser = _createArgParser();
     ArgResults results = parser.parse(arguments, <String, String>{});
     if (results[HELP_OPTION]) {
       _printUsage(parser.parser);
       return null;
     }
 
-    // TODO (danrubel) Remove this workaround
-    // once the underlying VM and dart:io issue has been fixed.
-    if (results[INTERNAL_DELAY_FREQUENCY] != null) {
-      AnalysisServer.performOperationDelayFrequency =
-          int.parse(results[INTERNAL_DELAY_FREQUENCY], onError: (_) => 0);
-    }
-
     int port;
     bool serve_http = false;
     if (results[PORT_OPTION] != null) {
       try {
         port = int.parse(results[PORT_OPTION]);
         serve_http = true;
       } on FormatException {
         print('Invalid port number: ${results[PORT_OPTION]}');
         print('');
         _printUsage(parser.parser);
@@ skipping 172 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.addFlag(VERBOSE_FLUTTER_COMPLETIONS,
         help: "enable verbose code completion for Flutter (experimental)");
     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(USE_ANALYSIS_HIGHLIGHT2,
         help: "enable version 2 of semantic highlight",
         defaultsTo: false,
         negatable: false);
     parser.addOption(FILE_READ_MODE,
         help: "an option for reading files (some clients normalize eol "
             "characters, which make the file offset and range information "
             "incorrect)",
         allowed: ["as-is", "normalize-eol-always"],
@@ skipping 83 matching lines @@
 
   _DiagnosticServerImpl();
 
   @override
   Future<int> getServerPort() => httpServer.serveHttp();
 
   Future startOnPort(int port) {
     return httpServer.serveHttp(port);
   }
 }