Remove import dart:core

Fixes #47092

TEST=existing

Change-Id: I3c5c0a1ec5e0426642a5dc70aa9a0391a143ed93
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/212298
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>

pkg/analysis_server/lib/src/analysis_server.dart

@@ -4,7 +4,6 @@
 
 import 'dart:async';
 import 'dart:collection';
-import 'dart:core';
 import 'dart:io' as io;
 import 'dart:math' show max;
 

pkg/analysis_server/lib/src/analysis_server_abstract.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 'dart:core';
 import 'dart:io' as io;
 import 'dart:io';
 

pkg/analysis_server/lib/src/context_manager.dart

@@ -4,7 +4,6 @@
 
 import 'dart:async';
 import 'dart:collection';
-import 'dart:core';
 
 import 'package:analysis_server/src/services/correction/fix/data_driven/transform_set_parser.dart';
 import 'package:analyzer/error/listener.dart';

pkg/analysis_server/lib/src/domain_analysis.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analysis_server/protocol/protocol_constants.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/computer/computer_hover.dart';

pkg/analysis_server/lib/src/domain_analytics.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_constants.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';

pkg/analysis_server/lib/src/domain_diagnostic.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_constants.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';

pkg/analysis_server/lib/src/domain_execution.dart

@@ -3,7 +3,6 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:collection';
-import 'dart:core';
 
 import 'package:analysis_server/protocol/protocol_constants.dart';
 import 'package:analysis_server/src/analysis_server.dart';

pkg/analysis_server/lib/src/domain_kythe.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_constants.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';

pkg/analysis_server/lib/src/services/completion/dart/uri_contributor.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analysis_server/src/provisional/completion/dart/completion_dart.dart';
 import 'package:analysis_server/src/services/completion/dart/suggestion_builder.dart';
 import 'package:analyzer/dart/ast/ast.dart';

pkg/analysis_server/lib/src/services/correction/bulk_fix_processor.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analysis_server/plugin/edit/fix/fix_dart.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/services/correction/change_workspace.dart';

pkg/analysis_server/lib/src/services/correction/executable_parameters.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/dart/analysis/session_helper.dart';

pkg/analysis_server/lib/src/services/correction/fix_internal.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analysis_server/plugin/edit/fix/fix_core.dart';
 import 'package:analysis_server/plugin/edit/fix/fix_dart.dart';
 import 'package:analysis_server/src/services/correction/base_processor.dart';

pkg/analysis_server/lib/src/services/refactoring/move_file.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analysis_server/src/protocol_server.dart' hide Element;
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';

pkg/analyzer/lib/file_system/overlay_file_system.dart

@@ -3,7 +3,6 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:convert';
-import 'dart:core';
 import 'dart:typed_data';
 
 import 'package:analyzer/file_system/file_system.dart';

pkg/analyzer/lib/src/analysis_options/analysis_options_provider.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/source/source_resource.dart';

pkg/analyzer/lib/src/context/builder.dart

@@ -3,7 +3,6 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:collection';
-import 'dart:core';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:yaml/yaml.dart';

pkg/analyzer/lib/src/source/package_map_resolver.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/util/asserts.dart' as asserts;

pkg/analyzer/lib/src/workspace/bazel.dart

@@ -4,7 +4,6 @@
 
 import 'dart:async';
 import 'dart:collection';
-import 'dart:core';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/dart/analysis/experiments.dart';

pkg/analyzer/lib/src/workspace/bazel_watcher.dart

@@ -3,7 +3,6 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
-import 'dart:core';
 import 'dart:io' as io;
 import 'dart:isolate';
 import 'dart:math';

pkg/analyzer/lib/src/workspace/gn.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/generated/sdk.dart';

pkg/analyzer/lib/src/workspace/package_build.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/generated/sdk.dart';

pkg/analyzer/test/embedder_tests.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 

pkg/analyzer/test/error/error_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 'dart:core';
 import 'dart:io';
 
 import 'package:analyzer/dart/analysis/features.dart';

pkg/analyzer/test/resource_utils.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/src/generated/source.dart';

pkg/analyzer/test/source/analysis_options_provider_test.dart

@@ -2,8 +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 'dart:core';
-
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/src/analysis_options/analysis_options_provider.dart';

pkg/dev_compiler/test/module_symbols/module_symbols_json_test.dart

@@ -4,7 +4,6 @@
 
 // @dart = 2.9
 
-import 'dart:core';
 import 'package:dev_compiler/src/kernel/module_symbols.dart';
 import 'package:test/test.dart';
 

pkg/front_end/lib/src/fasta/type_inference/type_inferrer.dart

@@ -2,8 +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.md file.
 
-import 'dart:core';
-
 import 'package:_fe_analyzer_shared/src/flow_analysis/flow_analysis.dart';
 
 import 'package:_fe_analyzer_shared/src/testing/id.dart';

pkg/kernel/lib/ast.dart

@@ -64,7 +64,6 @@
 ///
 library kernel.ast;
 
-import 'dart:core';
 import 'dart:collection' show ListBase;
 import 'dart:convert' show utf8;
 

pkg/test_runner/lib/src/browser_controller.dart

@@ -4,7 +4,6 @@
 
 import 'dart:async';
 import 'dart:convert';
-import 'dart:core';
 import 'dart:io';
 import 'dart:math';
 

pkg/vm/lib/transformations/specializer/map_factory_specializer.dart

@@ -4,7 +4,6 @@
 
 import 'package:kernel/ast.dart';
 import 'package:kernel/core_types.dart';
-import 'dart:core';
 
 import 'package:vm/transformations/specializer/factory_specializer.dart';
 

tests/language_2/vm/div_mod_test.dart

@@ -11,8 +11,6 @@
 
 import "package:expect/expect.dart";
 
-import 'dart:core';
-
 int kMin = 0x8000000000000000;
 int kMax = 0x7fffffffffffffff;