refactor(gae8): Remove unused auth region tag (#10341)

* refactor: remove auth sample markers from Greetings class

* Trigger GitHub Actions

Author: Kef131

appengine-java8/endpoints-v2-migration/src/main/java/com/example/helloendpoints/Greetings.java

@@ -69,12 +69,9 @@ public HelloGreeting insertGreeting(@Named("times") Integer times, HelloGreeting
   }
   // [END multiplygreetings]
 
-  // [START auth]
-
   @ApiMethod(name = "greetings.authed", path = "hellogreeting/authed")
   public HelloGreeting authedGreeting(User user) {
     HelloGreeting response = new HelloGreeting("hello " + user.getEmail());
     return response;
   }
-  // [END auth]
 }