Remove now unnecessary override of createClassLoader

Resolves #810

Author: onobc

spring-cloud-function-deployer/src/main/java/org/springframework/cloud/function/deployer/FunctionArchiveDeployer.java

@@ -20,7 +20,6 @@
 import java.lang.reflect.Method;
 import java.lang.reflect.Type;
 import java.net.URL;
-import java.net.URLClassLoader;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -159,13 +158,6 @@ void undeploy() {
 		}
 	}
 
-	// TODO remove this method all together once https://github.com/spring-projects/spring-boot/pull/20851 is addressed
-	@Override
-	protected ClassLoader createClassLoader(Iterator<Archive> archives) throws Exception {
-		URLClassLoader cl = (URLClassLoader) super.createClassLoader(archives);
-		return this.createClassLoader(cl.getURLs());
-	}
-
 	@Override
 	protected ClassLoader createClassLoader(URL[] urls) throws Exception {
 		String classAsPath = DeployerContextUtils.class.getName().replace('.', '/') + ".class";