HDFS-8589. Fix unused imports in BPServiceActor and BlockReportLeaseManager (cmccabe)

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -650,6 +650,9 @@ Release 2.8.0 - UNRELEASED
     HDFS-8446. Separate safemode related operations in GetBlockLocations().
     (wheat9)
 
+    HDFS-8589. Fix unused imports in BPServiceActor and BlockReportLeaseManager
+    (cmccabe)
+
   OPTIMIZATIONS
 
     HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockReportLeaseManager.java

@@ -17,7 +17,6 @@
  */
 package org.apache.hadoop.hdfs.server.blockmanagement;
 
-import com.google.common.base.Joiner;
 import com.google.common.base.Preconditions;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hdfs.DFSConfigKeys;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java

@@ -29,7 +29,6 @@ import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ThreadLocalRandom;
-import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 import com.google.common.base.Joiner;