Remove unnecessary overrides of finalize

Closes gh-28209

Author: wilkinsona

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -276,7 +276,7 @@ private Throwable doStart() throws Exception {
 		Assert.notNull(this.mainClassName, "Unable to find the main class to restart");
 		URL[] urls = this.urls.toArray(new URL[0]);
 		ClassLoaderFiles updatedFiles = new ClassLoaderFiles(this.classLoaderFiles);
-		ClassLoader classLoader = new RestartClassLoader(this.applicationClassLoader, urls, updatedFiles, this.logger);
+		ClassLoader classLoader = new RestartClassLoader(this.applicationClassLoader, urls, updatedFiles);
 		if (this.logger.isDebugEnabled()) {
 			this.logger.debug("Starting application " + this.mainClassName + " with URLs " + Arrays.asList(urls));
 		}

spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/restart/classloader/RestartClassLoader.java

@@ -42,8 +42,6 @@
  */
 public class RestartClassLoader extends URLClassLoader implements SmartClassLoader {
 
-	private final Log logger;
-
 	private final ClassLoaderFileRepository updatedFiles;
 
 	/**
@@ -73,14 +71,16 @@ public RestartClassLoader(ClassLoader parent, URL[] urls, ClassLoaderFileReposit
 	 * URLs were created.
 	 * @param urls the urls managed by the classloader
 	 * @param logger the logger used for messages
+	 * @deprecated since 2.4.11 for removal in 2.7.0 in favor of
+	 * {@link #RestartClassLoader(ClassLoader, URL[], ClassLoaderFileRepository)}
 	 */
+	@Deprecated
 	public RestartClassLoader(ClassLoader parent, URL[] urls, ClassLoaderFileRepository updatedFiles, Log logger) {
 		super(urls, parent);
 		Assert.notNull(parent, "Parent must not be null");
 		Assert.notNull(updatedFiles, "UpdatedFiles must not be null");
 		Assert.notNull(logger, "Logger must not be null");
 		this.updatedFiles = updatedFiles;
-		this.logger = logger;
 		if (logger.isDebugEnabled()) {
 			logger.debug("Created RestartClassLoader " + toString());
 		}
@@ -187,14 +187,6 @@ private URL createFileUrl(String name, ClassLoaderFile file) {
 		}
 	}
 
-	@Override
-	protected void finalize() throws Throwable {
-		if (this.logger.isDebugEnabled()) {
-			this.logger.debug("Finalized classloader " + toString());
-		}
-		super.finalize();
-	}
-
 	@Override
 	public boolean isClassReloadable(Class<?> classType) {
 		return (classType.getClassLoader() instanceof RestartClassLoader);

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/socket/FileDescriptor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -44,11 +44,6 @@ class FileDescriptor {
 		this.closer = closer;
 	}
 
-	@Override
-	protected void finalize() throws Throwable {
-		close();
-	}
-
 	/**
 	 * Acquire an instance of the actual {@link Handle}. The caller must
 	 * {@link Handle#close() close} the resulting handle when done.