remove duplicate completion suggestions

pkg/analysis_server/test/domain_completion_test.dart

Index: pkg/analysis_server/test/domain_completion_test.dart
diff --git a/pkg/analysis_server/test/domain_completion_test.dart b/pkg/analysis_server/test/domain_completion_test.dart
index 20f6a4197accdafce3c7c71f5cb0278c27b99b5b..9be198b339047b0714cc41f829dbb1080e710b75 100644
--- a/pkg/analysis_server/test/domain_completion_test.dart
+++ b/pkg/analysis_server/test/domain_completion_test.dart
@@ -421,7 +421,7 @@ class CompletionTest extends AbstractAnalysisTest {
   }
 
   test_locals() {
-    addTestFile('class A {var a; x() {var b;^}}');
+    addTestFile('class A {var a; x() {var b;^}} class DateTime { }');
     return getSuggestions().then((_) {
       expect(replacementOffset, equals(completionOffset));
       expect(replacementLength, equals(0));
@@ -432,6 +432,7 @@ class CompletionTest extends AbstractAnalysisTest {
           DART_RELEVANCE_LOCAL_VARIABLE);
       assertHasResult(CompletionSuggestionKind.INVOCATION, 'x',
           DART_RELEVANCE_LOCAL_METHOD);
+      assertHasResult(CompletionSuggestionKind.INVOCATION, 'DateTime');
     });
   }