Fix log name in ServletWebServerApplicationContext

Fixes gh-21354

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/context/ServletWebServerApplicationContext.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.
@@ -48,7 +48,6 @@ import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextException;
 import org.springframework.core.io.Resource;
 import org.springframework.util.StringUtils;
-import org.springframework.web.context.ContextLoader;
 import org.springframework.web.context.ContextLoaderListener;
 import org.springframework.web.context.ServletContextAware;
 import org.springframework.web.context.WebApplicationContext;
@@ -85,6 +84,7 @@ import org.springframework.web.context.support.WebApplicationContextUtils;
  *
  * @author Phillip Webb
  * @author Dave Syer
+ * @author Scott Frederick
  * @since 2.0.0
  * @see AnnotationConfigServletWebServerApplicationContext
  * @see XmlServletWebServerApplicationContext
@@ -270,7 +270,6 @@ public class ServletWebServerApplicationContext extends GenericWebApplicationCon
 			}
 			return;
 		}
-		Log logger = LogFactory.getLog(ContextLoader.class);
 		servletContext.log("Initializing Spring embedded WebApplicationContext");
 		try {
 			servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, this);