HDFS-11053. Unnecessary superuser check in versionRequest(). Contributed by Kihwal Lee.

(cherry picked from commit e90af4a89ba2741aeca20ead47699587b14f0de8)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java

@@ -1527,7 +1527,6 @@ public class NameNodeRpcServer implements NamenodeProtocols {
   @Override // DatanodeProtocol, NamenodeProtocol
   public NamespaceInfo versionRequest() throws IOException {
     checkNNStartup();
-    namesystem.checkSuperuserPrivilege();
     return namesystem.getNamespaceInfo();
   }