Code clean-up

pkg/analyzer/test/generated/constant_test.dart

 // Copyright (c) 2016, 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.
 
+@deprecated
 library analyzer.test.constant_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/src/generated/constant.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 385 matching lines @@
         TopLevelVariableDeclaration, declaration);
     NodeList<VariableDeclaration> variables =
         (declaration as TopLevelVariableDeclaration).variables.variables;
     expect(variables, hasLength(1));
     ConstantEvaluator evaluator = new ConstantEvaluator(
         source, analysisContext.typeProvider,
         typeSystem: analysisContext.typeSystem);
     return evaluator.evaluate(variables[0].initializer);
   }
 }