Fix analysis_server test to not expect redundant error.

pkg/analysis_server/test/analysis/notification_analysis_options_test.dart

 // Copyright (c) 2015, 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 test.analysis.notification.analysis_options;
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/domain_analysis.dart';
 import 'package:analyzer/src/generated/engine.dart';
@@ skipping 278 matching lines @@
     expect(testContext.analysisOptions.lint, true);
     var rules = getLints(testContext).map((rule) => rule.name);
     expect(rules, unorderedEquals(lints));
   }
 
   verifyStrongMode({bool enabled}) {
     // Verify strong-mode enabled.
     expect(testContext.analysisOptions.strongMode, enabled);
 
     if (enabled) {
-      // Should produce a warning and an error.
+      // Should produce a type warning.
       expect(
           errors.map((error) => error.type),
           unorderedEquals([
-            AnalysisErrorType.STATIC_TYPE_WARNING,
-            AnalysisErrorType.COMPILE_TIME_ERROR
+            AnalysisErrorType.STATIC_TYPE_WARNING
           ]));
     } else {
       // Should only produce a hint.
       expect(errors.map((error) => error.type),
           unorderedEquals([AnalysisErrorType.HINT]));
     }
   }
 }