Move scanner out of generated and clean up imports

pkg/analyzer/test/generated/constant_test.dart

Index: pkg/analyzer/test/generated/constant_test.dart
diff --git a/pkg/analyzer/test/generated/constant_test.dart b/pkg/analyzer/test/generated/constant_test.dart
index 2e3aacbfd6fc25fb83b1c20b40e0f17664d1307f..bb9ba02c842bd3a36539d23506f2d5c177225be2 100644
--- a/pkg/analyzer/test/generated/constant_test.dart
+++ b/pkg/analyzer/test/generated/constant_test.dart
@@ -5,14 +5,15 @@
 library analyzer.test.constant_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
+import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
+import 'package:analyzer/src/dart/ast/token.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/generated/constant.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/resolver.dart';
-import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/testing/ast_factory.dart';
@@ -29,8 +30,6 @@ import 'engine_test.dart';
 import 'resolver_test.dart';
 import 'test_support.dart';
 
-const int LONG_MAX_VALUE = 0x7fffffffffffffff;
-
 main() {
   initializeTestEnvironment();
   runReflectiveTests(ConstantEvaluatorTest);
@@ -42,6 +41,8 @@ main() {
   runReflectiveTests(ReferenceFinderTest);
 }
 
+const int LONG_MAX_VALUE = 0x7fffffffffffffff;
+
 /**
  * Implementation of [ConstantEvaluationValidator] used during unit tests;
  * verifies that any nodes referenced during constant evaluation are present in