remove code-transformers from the repo

pkg/code_transformers/test/entry_point_test.dart

-// Copyright (c) 2014, 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.
-
-library code_transformers.test.assets_test;
-
-import 'dart:async';
-
-import 'package:barback/barback.dart';
-import 'package:code_transformers/resolver.dart';
-import 'package:code_transformers/tests.dart';
-import 'package:unittest/compact_vm_config.dart';
-import 'package:unittest/unittest.dart';
-
-main() {
-  useCompactVMConfiguration();
-
-  Future checkDartEntry({Map<String, String> inputs, bool expectation}) {
-    var transformer = new Validator((transform) {
-      return isPossibleDartEntry(transform.primaryInput).then((value) {
-        expect(value, expectation);
-      });
-    });
-    return applyTransformers(
-          [[transformer]],
-          inputs: inputs);
-  }
-
-  group('isPossibleDartEntry', () {
-    test('should handle empty files', () {
-      return checkDartEntry(
-          inputs: {
-            'a|web/main.dart': '',
-          },
-          expectation: false);
-    });
-
-    test('should detect main methods', () {
-      return checkDartEntry(
-          inputs: {
-            'a|web/main.dart': 'main() {}',
-          },
-          expectation: true);
-    });
-
-    test('should exclude dart mains in lib folder', () {
-      return checkDartEntry(
-          inputs: {
-            'a|lib/main.dart': 'main() {}',
-          },
-          expectation: false);
-    });
-
-    test('should validate file extension', () {
-      return checkDartEntry(
-          inputs: {
-            'a|web/main.not_dart': 'main() {}',
-          },
-          expectation: false);
-    });
-
-    test('should count exports as main', () {
-      return checkDartEntry(
-          inputs: {
-            'a|web/main.dart': 'export "foo.dart";',
-          },
-          expectation: true);
-    });
-
-    test('should count parts as main', () {
-      return checkDartEntry(
-          inputs: {
-            'a|web/main.dart': 'part "foo.dart";',
-          },
-          expectation: true);
-    });
-
-    test('is tolerant of syntax errors with main', () {
-      return checkDartEntry(
-          inputs: {
-            'a|web/main.dart': 'main() {} {',
-          },
-          expectation: true);
-    });
-
-    test('is tolerant of syntax errors without main', () {
-      return checkDartEntry(
-          inputs: {
-            'a|web/main.dart': 'class Foo {',
-          },
-          expectation: false);
-    });
-  });
-}
-
-class Validator extends Transformer {
-  final Function validation;
-
-  Validator(this.validation);
-
-  Future apply(Transform transform) {
-    return new Future.value(validation(transform));
-  }
-}