Remove unused python version in dockerfile
Remove unused python version in dockerfile

jeffbryner/MozDef,mpurzynski/MozDef,mozilla/MozDef,Phrozyn/MozDef,Phrozyn/MozDef,mpurzynski/MozDef,gdestuynder/MozDef,mozilla/MozDef,jeffbryner/MozDef,jeffbryner/MozDef,mpurzynski/MozDef,gdestuynder/MozDef,mozilla/MozDef,Phrozyn/MozDef,mozilla/MozDef,mpurzynski/MozDef,gdestuynder/MozDef,jeffbryner/MozDef,gdestuynder/MozDef,Phrozyn/MozDef