* Also removed the header files that belong to those files.
* Only kept the userland_ipc.h header for now, to remember us about the
former userland server driver (that I also removed - it can always be
resurrected from SVN if needed).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25045 a95241bf-73f2-0310-859d-f6bbb57e9c96