Fix the test to remove extra hint.

pkg/analyzer/test/generated/resolver_test.dart

Index: pkg/analyzer/test/generated/resolver_test.dart
diff --git a/pkg/analyzer/test/generated/resolver_test.dart b/pkg/analyzer/test/generated/resolver_test.dart
index 72bfa95ccb7dbb4698cd8bbfc7eddb51555788d2..0000ed5ffc6a71508c2f83a434e59beebdd7abbf 100644
--- a/pkg/analyzer/test/generated/resolver_test.dart
+++ b/pkg/analyzer/test/generated/resolver_test.dart
@@ -11475,6 +11475,7 @@ int f(List<int> list) {
   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]);