remove useless import (PEP8)
remove useless import (PEP8)

murrown/cyder,drkitty/cyder,zeeman/cyder,OSU-Net/cyder,akeym/cyder,OSU-Net/cyder,murrown/cyder,akeym/cyder,zeeman/cyder,zeeman/cyder,murrown/cyder,zeeman/cyder,murrown/cyder,OSU-Net/cyder,OSU-Net/cyder,drkitty/cyder,akeym/cyder,drkitty/cyder,akeym/cyder,drkitty/cyder