[SPARK-18744][CORE] Remove workaround for Netty memory leak
authorShixiong Zhu <shixiong@databricks.com>
Tue, 6 Dec 2016 21:33:05 +0000 (13:33 -0800)
committerShixiong Zhu <shixiong@databricks.com>
Tue, 6 Dec 2016 21:33:05 +0000 (13:33 -0800)
commiteeed38eaf8c6912f3c51ba83903b67835a699f86
treeb6cb607035f03ecf22d6dc0486950165bffa7ea5
parentfac5b75b74b2d76b6314c69be3c769f1f321688c
[SPARK-18744][CORE] Remove workaround for Netty memory leak

## What changes were proposed in this pull request?

We added some codes in https://github.com/apache/spark/pull/14961 because of https://github.com/netty/netty/issues/5833

Now we can remove them as it's fixed in Netty 4.0.42.Final.

## How was this patch tested?

Jenkins

Author: Shixiong Zhu <shixiong@databricks.com>

Closes #16167 from zsxwing/remove-netty-workaround.
common/network-common/src/main/java/org/apache/spark/network/util/TransportConf.java