functions: Java log severity is NOT broken :) (#2882)

Fixes b/156655272

Author: Ace Nassri

functions/logging/log-helloworld/src/main/java/functions/LogHelloWorld.java

@@ -35,7 +35,6 @@ public void service(HttpRequest request, HttpResponse response)
     System.out.println("I am a log to stdout!");
     System.err.println("I am a log to stderr!");
 
-    // Stackdriver does not detect severity from Cloud Functions log output
     logger.info("I am an info log!");
     logger.warning("I am a warning log!");