remove old, unused atomthread package / class

src/main/java/com/rometools/modules/atomthread/ThreadModule.java

@@ -1,26 +0,0 @@
-/*
- *  Copyright 2011 robert.cooper.
- *
- *  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.
- *  under the License.
- */
-
-package com.rometools.modules.atomthread;
-
-/**
- *
- * @author robert.cooper
- */
-public interface ThreadModule {
-
-}