Remove ReactDOMNodeCache and getDOMNodeID.

These modules have been superseded by `ReactID`. Since they were only used
internally, and I have updated all client code that previously assumed
their existence, I believe they can be dropped for good.

src/core/ReactDOMNodeCache.js

@@ -1,26 +0,0 @@
-/**
- * Copyright 2013 Facebook, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * @providesModule ReactDOMNodeCache
- * @typechecks
- */
-
-"use strict";
-
-var ReactID = require('ReactID');
-
-exports.getNodeByID = ReactID.getNode;
-exports.purgeID = ReactID.purgeID;
-exports.purgeEntireCache = ReactID.purgeEntireCache;

src/dom/getDOMNodeID.js

@@ -1,27 +0,0 @@
-/**
- * Copyright 2013 Facebook, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * @providesModule getDOMNodeID
- * @typechecks
- */
-
-"use strict";
-
-var ReactID = require('ReactID');
-
-function getDOMNodeID(domNode) {
-  return ReactID.getID(domNode);
-}
-module.exports = getDOMNodeID;