YARN-11130. removed unused import (#4276)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/clientrm/RouterClientRMService.java

@@ -19,7 +19,6 @@
 package org.apache.hadoop.yarn.server.router.clientrm;
 
 import java.io.IOException;
-import java.io.InputStream;
 import java.net.InetSocketAddress;
 import java.util.ArrayList;
 import java.util.Collection;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-tests/src/test/java/org/apache/hadoop/yarn/server/NMTokenIdentifierNewForTest.java

@@ -25,7 +25,6 @@ import java.io.IOException;
 import org.apache.commons.io.IOUtils;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.security.UserGroupInformation;
-import org.apache.hadoop.security.token.TokenIdentifier;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.NodeId;
 import org.apache.hadoop.yarn.api.records.impl.pb.ApplicationAttemptIdPBImpl;