CQ. Remove stale tests.

These are either ancient syntax, or are about Object and actually not
checked, and there is no reason to check.

Change-Id: I5869aeea4012c6dee0bc158337eecf02e479c365
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/510200
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>

pkg/analyzer/test/src/diagnostics/argument_type_not_assignable_test.dart

@@ -2,7 +2,6 @@
 // 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.
 
-import 'package:analyzer/src/diagnostic/diagnostic.dart' as diag;
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
@@ -747,22 +746,6 @@ main() {
 }
 ''');
   }
-
-  @failingTest
-  test_tearOff_required() async {
-    await assertErrorsInCode(
-      '''
-class C {
-  Object/*=T*/ f/*<T>*/(Object/*=T*/ x) => x;
-}
-g(C c) {
-  var h = c.f/*<int>*/;
-  print(h('s'));
-}
-''',
-      [error(diag.argumentTypeNotAssignable, 99, 1)],
-    );
-  }
 }
 
 @reflectiveTest

pkg/analyzer/test/src/diagnostics/object_cannot_extend_another_class_test.dart

@@ -1,28 +0,0 @@
-// Copyright (c) 2019, 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.
-
-import 'package:analyzer/src/diagnostic/diagnostic.dart' as diag;
-import 'package:test_reflective_loader/test_reflective_loader.dart';
-
-import '../dart/resolution/context_collection_resolution.dart';
-
-main() {
-  defineReflectiveSuite(() {
-    defineReflectiveTests(ObjectCannotExtendAnotherClassTest);
-  });
-}
-
-@reflectiveTest
-class ObjectCannotExtendAnotherClassTest extends PubPackageResolutionTest {
-  @failingTest
-  test_object_extends_class() async {
-    // TODO(brianwilkerson): Implement this check.
-    await assertErrorsInCode(
-      r'''
-class Object extends List {}
-''',
-      [error(diag.objectCannotExtendAnotherClass, 0, 0)],
-    );
-  }
-}

pkg/analyzer/test/src/diagnostics/super_initializer_in_object_test.dart

@@ -1,29 +0,0 @@
-// Copyright (c) 2019, 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.
-
-import 'package:analyzer/src/diagnostic/diagnostic.dart' as diag;
-import 'package:test_reflective_loader/test_reflective_loader.dart';
-
-import '../dart/resolution/context_collection_resolution.dart';
-
-main() {
-  defineReflectiveSuite(() {
-    defineReflectiveTests(SuperInitializerInObjectTest);
-  });
-}
-
-@reflectiveTest
-class SuperInitializerInObjectTest extends PubPackageResolutionTest {
-  @failingTest
-  test_superInitializerInObject() async {
-    await assertErrorsInCode(
-      r'''
-class Object {
-  Object() : super();
-}
-''',
-      [error(diag.superInitializerInObject, 0, 0)],
-    );
-  }
-}

pkg/analyzer/test/src/diagnostics/test_all.dart

@@ -704,8 +704,6 @@ import 'nullable_type_in_on_clause_test.dart' as nullable_type_in_on_clause;
 import 'nullable_type_in_with_clause_test.dart' as nullable_type_in_with_clause;
 import 'number_literals_with_separators_test.dart'
     as number_literals_with_separators;
-import 'object_cannot_extend_another_class_test.dart'
-    as object_cannot_extend_another_class;
 import 'obsolete_colon_for_default_value_test.dart'
     as obsolete_colon_for_default_value;
 import 'on_repeated_test.dart' as on_repeated;
@@ -840,7 +838,6 @@ import 'super_in_extension_type_test.dart' as super_in_extension_type;
 import 'super_in_invalid_context_test.dart' as super_in_invalid_context;
 import 'super_in_redirecting_constructor_test.dart'
     as super_in_redirecting_constructor;
-import 'super_initializer_in_object_test.dart' as super_initializer_in_object;
 import 'super_invocation_not_last_test.dart' as super_invocation_not_last;
 import 'switch_case_completes_normally_test.dart'
     as switch_case_completes_normally;
@@ -1418,7 +1415,6 @@ main() {
     nullable_type_in_on_clause.main();
     nullable_type_in_with_clause.main();
     number_literals_with_separators.main();
-    object_cannot_extend_another_class.main();
     obsolete_colon_for_default_value.main();
     on_repeated.main();
     optional_parameter_in_operator.main();
@@ -1500,7 +1496,6 @@ main() {
     super_in_extension_type.main();
     super_in_invalid_context.main();
     super_in_redirecting_constructor.main();
-    super_initializer_in_object.main();
     super_invocation_not_last.main();
     switch_case_completes_normally.main();
     tearoff_of_generative_constructor_of_abstract_class.main();