pynipap: remove xmlrpc dependency
pynipap: remove xmlrpc dependency

xmlrpclib is shipped with Python so I don't think we need to declare a
dependency on it.

Fixes #805.

ettrig/NIPAP,fredsod/NIPAP,SpriteLink/NIPAP,fredsod/NIPAP,SoundGoof/NIPAP,bbaja42/NIPAP,garberg/NIPAP,SpriteLink/NIPAP,fredsod/NIPAP,fredsod/NIPAP,SpriteLink/NIPAP,bbaja42/NIPAP,ettrig/NIPAP,SoundGoof/NIPAP,ettrig/NIPAP,fredsod/NIPAP,bbaja42/NIPAP,garberg/NIPAP,SpriteLink/NIPAP,SoundGoof/NIPAP,ettrig/NIPAP,garberg/NIPAP,garberg/NIPAP,bbaja42/NIPAP,bbaja42/NIPAP,garberg/NIPAP,SoundGoof/NIPAP,SpriteLink/NIPAP,SpriteLink/NIPAP,ettrig/NIPAP,bbaja42/NIPAP,SoundGoof/NIPAP,fredsod/NIPAP,ettrig/NIPAP,garberg/NIPAP,SoundGoof/NIPAP