[SPARK-14667] Remove HashShuffleManager

## What changes were proposed in this pull request?
The sort shuffle manager has been the default since Spark 1.2. It is time to remove the old hash shuffle manager.

## How was this patch tested?
Removed some tests related to the old manager.

Author: Reynold Xin <rxin@databricks.com>

Closes #12423 from rxin/SPARK-14667.

1 files changed, 0 insertions, 4 deletions

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/ShuffleExchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/ShuffleExchange.scala
index 7e35db7dd8..d7deac9337 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/ShuffleExchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/ShuffleExchange.scala
@@ -22,7 +22,6 @@ import java.util.Random
 import org.apache.spark._
 import org.apache.spark.rdd.RDD
 import org.apache.spark.serializer.Serializer
-import org.apache.spark.shuffle.hash.HashShuffleManager
 import org.apache.spark.shuffle.sort.SortShuffleManager
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.errors._
@@ -179,9 +178,6 @@ object ShuffleExchange {
         // copy.
         true
       }
-    } else if (shuffleManager.isInstanceOf[HashShuffleManager]) {
-      // We're using hash-based shuffle, so we don't need to copy.
-      false
     } else {
       // Catch-all case to safely handle any future ShuffleManager implementations.
       true