fix pep8, not used json import
fix pep8, not used json import

AndrzejR/mining,jgabriellima/mining,mining/mining,mlgruby/mining,mlgruby/mining,jgabriellima/mining,mining/mining,avelino/mining,AndrzejR/mining,seagoat/mining,chrisdamba/mining,avelino/mining,seagoat/mining,chrisdamba/mining,mlgruby/mining