Fix the test to remove extra hint.

pkg/analyzer/test/generated/resolver_test.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 engine.resolver_test;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/context/context.dart' as newContext;
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 11457 matching lines @@
     assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
   }
 
   void test_forEach() {
     Source source = addSource(r'''
 int f(List<int> list) {
   num sum = 0;
   for (num n in list) {
     sum += n & 0x0F;
   }
+  return sum;

[Brian Wilkerson, 2015/06/09 16:25:57]

Why didn't we get the hint in the old code base?

[scheglov, 2015/06/09 17:23:59]

Good question.
That's because we compute hints always, no matter what's value of
AnalysisOptions.hint flag.
Fixed.

 }''');
     resolve(source);
     assertErrors(source, [StaticTypeWarningCode.UNDEFINED_OPERATOR]);
   }
 
   void test_if_and_is() {
     Source source = addSource(r'''
 int f(num n) {
   if (n is int && n > 0) {
     return n & 0x0F;
@@ skipping 2387 matching lines @@
         // check propagated type
         FunctionType propagatedType = node.propagatedType as FunctionType;
         expect(propagatedType.returnType, test.typeProvider.stringType);
       } on AnalysisException catch (e, stackTrace) {
         thrownException[0] = new CaughtException(e, stackTrace);
       }
     }
     return null;
   }
 }