refactor: remove redundant api_def comments from Greetings class

Author: Kef131

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

@@ -27,8 +27,6 @@
 
 // [END begin]
 
-// [START api_def]
-
 /** Defines v1 of a helloworld API, which provides simple "greeting" methods. */
 @Api(
     name = "helloworld",
@@ -45,8 +43,7 @@ public class Greetings {
     greetings.add(new HelloGreeting("hello world!"));
     greetings.add(new HelloGreeting("goodbye world!"));
   }
-  // [END api_def]
-
+  
   // [START getgreetings]
 
   public HelloGreeting getGreeting(@Named("id") Integer id) throws NotFoundException {