YARN-3236. Cleanup RMAuthenticationFilter#AUTH_HANDLER_PROPERTY.

Contributed by zhihai xu

hadoop-yarn-project/CHANGES.txt

@@ -315,6 +315,9 @@ Release 2.7.0 - UNRELEASED
     YARN-3237. AppLogAggregatorImpl fails to log error cause.
     (Rushabh S Shah via xgong)
 
+    YARN-3236. Cleanup RMAuthenticationFilter#AUTH_HANDLER_PROPERTY.
+    (zhihai xu via xgong)
+
   OPTIMIZATIONS
 
     YARN-2990. FairScheduler's delay-scheduling always waits for node-local and 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/security/http/RMAuthenticationFilter.java

@@ -40,8 +40,6 @@ public class RMAuthenticationFilter extends
     DelegationTokenAuthenticationFilter {
 
   static private AbstractDelegationTokenSecretManager<?> manager;
-  public static final String AUTH_HANDLER_PROPERTY =
-      "yarn.resourcemanager.authentication-handler";
   private static final String OLD_HEADER = "Hadoop-YARN-Auth-Delegation-Token";
 
   public RMAuthenticationFilter() {