setup.py: Make sure that `splauncher.egg-info` is clean when doing a develop uninstall.
setup.py: Make sure that `splauncher.egg-info` is clean when doing a develop uninstall.

jakirkham/splauncher,nanshe-org/splauncher,DudLab/splauncher,DudLab/splauncher,jakirkham/splauncher,nanshe-org/splauncher