Remove an obsolete test (TBR)

pkg/analysis_server/test/services/completion/dart/imported_reference_contributor_test.dart

Index: pkg/analysis_server/test/services/completion/dart/imported_reference_contributor_test.dart
diff --git a/pkg/analysis_server/test/services/completion/dart/imported_reference_contributor_test.dart b/pkg/analysis_server/test/services/completion/dart/imported_reference_contributor_test.dart
index 77eb9a5bd48c5952edac882cf4f22977ac07763e..5422b42c3e0b3ed153bf4954be9a48920d080596 100644
--- a/pkg/analysis_server/test/services/completion/dart/imported_reference_contributor_test.dart
+++ b/pkg/analysis_server/test/services/completion/dart/imported_reference_contributor_test.dart
@@ -29,28 +29,6 @@ class ImportedReferenceContributorTest extends DartCompletionContributorTest {
     return new ImportedReferenceContributor();
   }
 
-  test_ArgDefaults_Flutter_cons_with_children() async {
-    addMetaPackageSource();
-
-    configureFlutterPkg({
-      'src/widgets/framework.dart': flutter_framework_code,
-    });
-
-    addTestSource('''
-import 'package:flutter/src/widgets/framework.dart';
-
-build() => new Container(
-    child: new Row^
-  );
-''');
-
-    await computeSuggestions();
-
-    assertSuggestConstructor("Row",
-        defaultArgListString: "children: <Widget>[]",
-        defaultArgumentListTextRanges: [10, 10]);
-  }
-
   /// Sanity check.  Permutations tested in local_ref_contributor.
   test_ArgDefaults_function_with_required_named() async {
     addMetaPackageSource();