Revert "Move dart2js from sdk/lib/_internal/compiler to pkg/compiler"

pkg/compiler/lib/src/scanner/scannerlib.dart

Index: pkg/compiler/lib/src/scanner/scannerlib.dart
diff --git a/pkg/compiler/lib/src/scanner/scannerlib.dart b/pkg/compiler/lib/src/scanner/scannerlib.dart
deleted file mode 100644
index cd420a6c28044a77024dc500f533ac8b817caea9..0000000000000000000000000000000000000000
--- a/pkg/compiler/lib/src/scanner/scannerlib.dart
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright (c) 2011, 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 scanner;
-
-import 'dart:collection' show IterableBase, HashSet;
-
-import '../dart_types.dart' show DynamicType;
-import '../elements/elements.dart';
-
-import '../elements/modelx.dart' show
-    ClassElementX,
-    CompilationUnitElementX,
-    ConstructorElementX,
-    DeclarationSite,
-    ElementX,
-    FieldElementX,
-    FunctionElementX,
-    MetadataAnnotationX,
-    MixinApplicationElementX,
-    TypedefElementX,
-    VariableElementX,
-    VariableList;
-
-import '../elements/visitor.dart'
-    show ElementVisitor;
-import '../dart2jslib.dart';
-import '../native/native.dart' as native;
-import '../string_validator.dart';
-import '../tree/tree.dart';
-import '../util/characters.dart';
-import '../util/util.dart';
-import '../source_file.dart' show SourceFile, Utf8BytesSourceFile;
-import 'dart:convert' show UTF8, UNICODE_BOM_CHARACTER_RUNE;
-import 'dart:typed_data' show Uint8List;
-
-part 'class_element_parser.dart';
-part 'keyword.dart';
-part 'listener.dart';
-part 'parser.dart';
-part 'parser_task.dart';
-part 'partial_parser.dart';
-part 'scanner.dart';
-part 'scanner_task.dart';
-part 'array_based_scanner.dart';
-part 'utf8_bytes_scanner.dart';
-part 'string_scanner.dart';
-part 'token.dart';