remove smoke from the repo

pkg/smoke/test/codegen/common.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 smoke.test.codegen.common;
-
-import 'package:smoke/codegen/generator.dart';
-import 'package:unittest/unittest.dart';
-
-checkResults(SmokeCodeGenerator generator, {List<String> imports: const [],
-    String topLevel: '', String initCall}) {
-  var allImports = []..addAll(DEFAULT_IMPORTS)..addAll(imports)..add('');
-  var genImports = new StringBuffer();
-  generator.writeImports(genImports);
-  expect(genImports.toString(), allImports.join('\n'));
-
-  var genTopLevel = new StringBuffer();
-  generator.writeTopLevelDeclarations(genTopLevel);
-  expect(genTopLevel.toString(), topLevel);
-
-  var indentedCode = initCall.replaceAll("\n", "\n  ").trim();
-  var genInitCall = new StringBuffer();
-  genInitCall.write('  useGeneratedCode(');
-  generator.writeStaticConfiguration(genInitCall);
-  genInitCall.writeln(');');
-  expect(genInitCall.toString(), '  $indentedCode\n');
-}