Clean the codes

Author: zsxwing

streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingJobProgressListener.scala

@@ -169,17 +169,6 @@ private[streaming] class StreamingJobProgressListener(ssc: StreamingContext)
     }.toMap
   }
 
-
-  /**
-   * Return event rate for all receivers together in each batch time. These are pairs of
-   * an event rate with a batch time.
-   */
-  def eventRateForAllReceivers: Seq[(Long, Double)] = synchronized {
-    retainedBatches.take(batchInfoLimit).map { batchInfo =>
-      (batchInfo.batchTime.milliseconds, batchInfo.numRecords.toDouble * 1000 / batchDuration)
-    }
-  }
-
   def lastReceivedBatchRecords: Map[Int, Long] = synchronized {
     val lastReceivedBlockInfoOption = lastReceivedBatch.map(_.receivedBlockInfo)
     lastReceivedBlockInfoOption.map { lastReceivedBlockInfo =>
@@ -195,7 +184,7 @@ private[streaming] class StreamingJobProgressListener(ssc: StreamingContext)
     receiverInfos.get(receiverId)
   }
 
-  def receiverLastErrorTimeo(receiverId: Int): Option[Long] = synchronized {
+  def receiverLastErrorTime(receiverId: Int): Option[Long] = synchronized {
     receiverLastErrorTime.get(receiverId)
   }
 

streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingPage.scala

@@ -356,7 +356,7 @@ private[ui] class StreamingPage(parent: StreamingTab)
       if (msg.size > 100) msg.take(97) + "..." else msg
     }.getOrElse(emptyCell)
     val receiverLastErrorTime =
-      listener.receiverLastErrorTimeo(receiverId).map(UIUtils.formatDate).getOrElse(emptyCell)
+      listener.receiverLastErrorTime(receiverId).map(UIUtils.formatDate).getOrElse(emptyCell)
     val receivedRecords = listener.receivedRecordsWithBatchTime.get(receiverId).getOrElse(Seq())
 
     val timelineForEventRate =