Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=56189
Remove unused file.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1572574 13f79535-47bb-0310-9956-ffa450edef68
WIP NIO2 connector
Fixes and cleanups for input stability.
Fix output corruption for blocking IO.
Fix async (except keepalive after async), non blocking output, deadlocks and stability.
Fix oops for output corruption, harmonize with other connectors keepalive, fix keepalive after async and fix sendfile.