Remove unneeded comment

Author: Frank Natividad

appengine/endpoints-frameworks-v2/guice-example/src/main/java/com/example/echo/EchoGuiceListener.java

@@ -16,7 +16,6 @@
 
 package com.example.echo;
 
-//import com.google.api.server.spi.guice.GuiceServletContextListener;
 import com.google.inject.Guice;
 import com.google.inject.Injector;
 import com.google.inject.servlet.GuiceServletContextListener;