remove unused class (#1049)

maven-xml-impl/src/main/java/org/apache/maven/internal/xml/MavenXmlException.java

@@ -1,39 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you 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.apache.maven.internal.xml;
-
-public class MavenXmlException extends RuntimeException {
-    public MavenXmlException() {}
-
-    public MavenXmlException(String message) {
-        super(message);
-    }
-
-    public MavenXmlException(String message, Throwable cause) {
-        super(message, cause);
-    }
-
-    public MavenXmlException(Throwable cause) {
-        super(cause);
-    }
-
-    public MavenXmlException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
-        super(message, cause, enableSuppression, writableStackTrace);
-    }
-}