Remove ability to disable new analysis driver

pkg/analysis_server/lib/src/status/diagnostics.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.
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/analysis_server.dart';
@@ skipping 1057 matching lines @@
       : super(site, 'status', 'Status',
             description:
                 'General status and diagnostics for the analysis server.');
 
   @override
   void generateContent(Map<String, String> params) {
     buf.writeln('<div class="columns">');
 
     buf.writeln('<div class="column one-half">');
     h3('Status');
-    buf.writeln(writeOption(
-        'New analysis driver enabled', server.options.enableNewAnalysisDriver));
     buf.writeln(writeOption('Instrumentation enabled',
         AnalysisEngine.instance.instrumentationService.isActive));
     buf.writeln(writeOption('Server process ID', pid));
     buf.writeln('</div>');
 
     buf.writeln('<div class="column one-half">');
     h3('Versions');
     buf.writeln(writeOption('Analysis server version', AnalysisServer.VERSION));
     buf.writeln(writeOption('Dart SDK', Platform.version));
     buf.writeln('</div>');
@@ skipping 42 matching lines @@
     h3('Execution domain');
     ul(ExecutionService.VALUES, (item) {
       if (domain.onFileAnalyzed != null) {
         buf.write('$item (has subscriptions)');
       } else {
         buf.write('$item (no subscriptions)');
       }
     });
   }
 }