Remove unnecessary and unused SortedProperties Groovy class.

buildSrc/src/main/groovy/io/spring/gradle/convention/SortedProperties.groovy

@@ -1,53 +0,0 @@
-/*
- * Copyright 2002-2017 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
- *
- *      https://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 io.spring.gradle.convention;
-
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.Enumeration;
-import java.util.List;
-import java.util.Properties;
-
-/**
- * A Properties which sorts they keys so that they can be written to a File with
- * the keys sorted.
- *
- * @author Rob Winch
- *
- */
-class SortedProperties extends Properties {
-	private static final long serialVersionUID = -6199017589626540836L;
-
-	public Enumeration<Object> keys() {
-		Enumeration<Object> keysEnum = super.keys();
-		List<Object> keyList = new ArrayList<Object>();
-
-		while (keysEnum.hasMoreElements()) {
-			keyList.add(keysEnum.nextElement());
-		}
-
-		Collections.sort(keyList, new Comparator<Object>() {
-			@Override
-			public int compare(Object o1, Object o2) {
-				return o1.toString().compareTo(o2.toString());
-			}
-		});
-
-		return Collections.enumeration(keyList);
-	}
-}