updated comments

Signed-off-by: Tihomir Surdilovic <tihomir@temporal.io>

Author: tsurdilo

core/src/main/java/io/temporal/samples/autoheartbeat/AutoActivitiesImpl.java

@@ -37,7 +37,6 @@ public String runActivityTwo(String input) {
 
   @SuppressWarnings("FutureReturnValueIgnored")
   private String runActivity(String input) {
-    // Calculate heartbeat period based on our heartbeat timeout
     // Start Autoheartbeater
     AutoHeartbeater autoHearbeater =
         new AutoHeartbeater(