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

pkg/compiler/lib/src/common.dart

Index: pkg/compiler/lib/src/common.dart
diff --git a/pkg/compiler/lib/src/common.dart b/pkg/compiler/lib/src/common.dart
deleted file mode 100644
index ff58374feb7494caefdc5d989295dc77c27f696f..0000000000000000000000000000000000000000
--- a/pkg/compiler/lib/src/common.dart
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright (c) 2013, 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 dart2js.common;
-
-export 'constants/values.dart' show
-    ConstantValue,
-    InterceptorConstantValue,
-    NullConstantValue,
-    TypeConstantValue;
-
-export 'dart2jslib.dart' show
-    CompilerTask,
-    Compiler,
-    ConstantEnvironment,
-    MessageKind,
-    Selector,
-    TreeElements,
-    invariant;
-
-export 'dart_types.dart' show
-    DartType,
-    FunctionType,
-    InterfaceType,
-    TypeVariableType,
-    Types;
-
-export 'elements/elements.dart' show
-    ClassElement,
-    ClosureFieldElement,
-    CompilationUnitElement,
-    Element,
-    Elements,
-    FunctionElement,
-    FunctionSignature,
-    LibraryElement,
-    MetadataAnnotation,
-    MixinApplicationElement,
-    TypedefElement,
-    VariableElement;
-
-export 'tree/tree.dart' show
-    Node;
-
-export 'types/types.dart' show
-    TypeMask;
-
-export 'universe/universe.dart' show
-    SelectorKind;
-
-export 'util/util.dart' show
-    Link,
-    SpannableAssertionFailure;