Remove an unused request and the associated type

pkg/analyzer_plugin/lib/protocol/protocol_constants.dart

 // Copyright (c) 2017, 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".
 
 const String ANALYSIS_NOTIFICATION_ERRORS = 'analysis.errors';
 const String ANALYSIS_NOTIFICATION_ERRORS_ERRORS = 'errors';
@@ skipping 17 matching lines @@
 const String ANALYSIS_NOTIFICATION_OUTLINE_OUTLINE = 'outline';
 const String ANALYSIS_REQUEST_GET_NAVIGATION = 'analysis.getNavigation';
 const String ANALYSIS_REQUEST_GET_NAVIGATION_FILE = 'file';
 const String ANALYSIS_REQUEST_GET_NAVIGATION_LENGTH = 'length';
 const String ANALYSIS_REQUEST_GET_NAVIGATION_OFFSET = 'offset';
 const String ANALYSIS_REQUEST_HANDLE_WATCH_EVENTS =
     'analysis.handleWatchEvents';
 const String ANALYSIS_REQUEST_HANDLE_WATCH_EVENTS_EVENTS = 'events';
 const String ANALYSIS_REQUEST_REANALYZE = 'analysis.reanalyze';
 const String ANALYSIS_REQUEST_REANALYZE_ROOTS = 'roots';
-const String ANALYSIS_REQUEST_SET_CONTEXT_BUILDER_OPTIONS =
-    'analysis.setContextBuilderOptions';
-const String ANALYSIS_REQUEST_SET_CONTEXT_BUILDER_OPTIONS_OPTIONS = 'options';
 const String ANALYSIS_REQUEST_SET_CONTEXT_ROOTS = 'analysis.setContextRoots';
 const String ANALYSIS_REQUEST_SET_CONTEXT_ROOTS_ROOTS = 'roots';
 const String ANALYSIS_REQUEST_SET_PRIORITY_FILES = 'analysis.setPriorityFiles';
 const String ANALYSIS_REQUEST_SET_PRIORITY_FILES_FILES = 'files';
 const String ANALYSIS_REQUEST_SET_SUBSCRIPTIONS = 'analysis.setSubscriptions';
 const String ANALYSIS_REQUEST_SET_SUBSCRIPTIONS_SUBSCRIPTIONS = 'subscriptions';
 const String ANALYSIS_REQUEST_UPDATE_CONTENT = 'analysis.updateContent';
 const String ANALYSIS_REQUEST_UPDATE_CONTENT_FILES = 'files';
 const String ANALYSIS_RESPONSE_GET_NAVIGATION_FILES = 'files';
 const String ANALYSIS_RESPONSE_GET_NAVIGATION_REGIONS = 'regions';
@@ skipping 42 matching lines @@
 const String PLUGIN_REQUEST_VERSION_CHECK = 'plugin.versionCheck';
 const String PLUGIN_REQUEST_VERSION_CHECK_BYTE_STORE_PATH = 'byteStorePath';
 const String PLUGIN_REQUEST_VERSION_CHECK_SDK_PATH = 'sdkPath';
 const String PLUGIN_REQUEST_VERSION_CHECK_VERSION = 'version';
 const String PLUGIN_RESPONSE_VERSION_CHECK_CONTACT_INFO = 'contactInfo';
 const String PLUGIN_RESPONSE_VERSION_CHECK_INTERESTING_FILES =
     'interestingFiles';
 const String PLUGIN_RESPONSE_VERSION_CHECK_IS_COMPATIBLE = 'isCompatible';
 const String PLUGIN_RESPONSE_VERSION_CHECK_NAME = 'name';
 const String PLUGIN_RESPONSE_VERSION_CHECK_VERSION = 'version';