remove obsolete imports
remove obsolete imports

furbrain/Coherence,unintended/Cohen,opendreambox/python-coherence,sreichholf/python-coherence,ismaelgaudioso/Coherence,furbrain/Coherence,ismaelgaudioso/Coherence,opendreambox/python-coherence,sreichholf/python-coherence,unintended/Cohen,coherence-project/Coherence,coherence-project/Coherence