Move core and coreimpl from corelib/ to lib/core and lib/coreimpl.

corelib/src/bool.dart

Index: corelib/src/bool.dart
diff --git a/corelib/src/bool.dart b/corelib/src/bool.dart
deleted file mode 100644
index 3225a9989978ca9d4a380f1b35574bef900fdcb6..0000000000000000000000000000000000000000
--- a/corelib/src/bool.dart
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright (c) 2012, 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.
-
-// Dart core library.
-
-class bool {
-  factory bool._uninstantiable() {
-    throw const UnsupportedOperationException(
-        "class bool cannot be instantiated");
-  }
-}