Remove unnecessary changes committed in r223222.
There were 2 different patches in discussion. One using ioctl
and other using select. We decided to use the ioctl but committed
code also have some changes which were only needed for 'select'.
This patch removes them.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@223227 91177308-0d34-0410-b5e6-96231b3b80d8