YARN-9433. Remove unused constants in YARN resource manager

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/RMAuditLogger.java

@@ -69,7 +69,6 @@ public class RMAuditLogger {
     public static final String FINISH_FAILED_APP = "Application Finished - Failed";
     public static final String FINISH_KILLED_APP = "Application Finished - Killed";
     public static final String REGISTER_AM = "Register App Master";
-    public static final String AM_ALLOCATE = "App Master Heartbeats";
     public static final String UNREGISTER_AM = "Unregister App Master";
     public static final String ALLOC_CONTAINER = "AM Allocated Container";
     public static final String RELEASE_CONTAINER = "AM Released Container";
@@ -78,16 +77,12 @@ public class RMAuditLogger {
     public static final String UPDATE_APP_TIMEOUTS =
         "Update Application Timeouts";
     public static final String GET_APP_TIMEOUTS = "Get Application Timeouts";
-    public static final String CHANGE_CONTAINER_RESOURCE =
-        "AM Changed Container Resource";
     public static final String SIGNAL_CONTAINER = "Signal Container Request";
 
     // Some commonly used descriptions
     public static final String UNAUTHORIZED_USER = "Unauthorized user";
     
     // For Reservation system
-    public static final String CREATE_NEW_RESERVATION_REQUEST = "Create " +
-        "Reservation Request";
     public static final String SUBMIT_RESERVATION_REQUEST = "Submit Reservation Request";
     public static final String UPDATE_RESERVATION_REQUEST = "Update Reservation Request";
     public static final String DELETE_RESERVATION_REQUEST = "Delete Reservation Request";