Remove unused import

jerryshao · jerryshao · commit 2b08b483e6a6 · 2017-05-31T21:16:12.000+08:00
Change-Id: Id3b501645fca858ec4636cee30163ea39fe7ce4f
diff --git a/core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala b/core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala
@@ -21,7 +21,6 @@ import java.io.IOException
 import java.security.PrivilegedExceptionAction
 import java.text.DateFormat
 import java.util.{Arrays, Comparator, Date, Locale}
-import java.util.concurrent.ConcurrentHashMap
 
 import scala.collection.JavaConverters._
 import scala.collection.mutable
