Merge pull request #20407 from wycm

* pr/20407:
  Update copyright of changed file
  Polish

Closes gh-20407

spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/RemoteUrlPropertyExtractor.java

 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -54,7 +54,7 @@ class RemoteUrlPropertyExtractor implements ApplicationListener<ApplicationEnvir
 		catch (URISyntaxException ex) {
 			throw new IllegalStateException("Malformed URL '" + url + "'");
 		}
-		Map<String, Object> source = Collections.singletonMap("remoteUrl", (Object) url);
+		Map<String, Object> source = Collections.singletonMap("remoteUrl", url);
 		PropertySource<?> propertySource = new MapPropertySource("remoteUrl", source);
 		environment.getPropertySources().addLast(propertySource);
 	}