removing AbstractHeaderTransformer since it is no longer used

org.springframework.integration/src/test/java/org/springframework/integration/transformer/HeaderTransformerTests.java

@@ -1,74 +0,0 @@
-/*
- * Copyright 2002-2008 the original author or authors.
- *
- * 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.
- */
-
-package org.springframework.integration.transformer;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNull;
-
-import java.util.Map;
-
-import org.junit.Test;
-
-import org.springframework.integration.core.Message;
-import org.springframework.integration.message.MessageBuilder;
-
-/**
- * @author Mark Fisher
- */
-public class HeaderTransformerTests {
-
-	@Test
-	public void addHeader() {
-		AbstractHeaderTransformer transformer = new AbstractHeaderTransformer() {
-			@Override
-			protected void transformHeaders(Map<String, Object> headers) {
-				headers.put("header2", "baz");
-			}
-		};
-		Message<String> message = MessageBuilder.withPayload("foo").setHeader("header1", "bar").build();
-		Message<?> result = transformer.transform(message);
-		assertEquals("bar", result.getHeaders().get("header1"));
-		assertEquals("baz", result.getHeaders().get("header2"));
-	}
-
-	@Test
-	public void replaceHeader() {
-		AbstractHeaderTransformer transformer = new AbstractHeaderTransformer() {
-			@Override
-			protected void transformHeaders(Map<String, Object> headers) {
-				headers.put("header1", "baz");
-			}
-		};
-		Message<String> message = MessageBuilder.withPayload("foo").setHeader("header1", "bar").build();
-		Message<?> result = transformer.transform(message);
-		assertEquals("baz", result.getHeaders().get("header1"));
-	}
-
-	@Test
-	public void removeHeader() {
-		AbstractHeaderTransformer transformer = new AbstractHeaderTransformer() {
-			@Override
-			protected void transformHeaders(Map<String, Object> headers) {
-				headers.remove("header1");
-			}
-		};
-		Message<String> message = MessageBuilder.withPayload("foo").setHeader("header1", "bar").build();
-		Message<?> result = transformer.transform(message);
-		assertNull(result.getHeaders().get("header1"));
-	}
-
-}