remove unused variable
remove unused variable

Hooray travis-ci catching lint errors :)

de-vri-es/qtile,StephenBarnes/qtile,flacjacket/qtile,himaaaatti/qtile,ramnes/qtile,jdowner/qtile,aniruddhkanojia/qtile,soulchainer/qtile,w1ndy/qtile,encukou/qtile,EndPointCorp/qtile,encukou/qtile,kiniou/qtile,andrewyoung1991/qtile,zordsdavini/qtile,jdowner/qtile,tych0/qtile,farebord/qtile,andrewyoung1991/qtile,himaaaatti/qtile,nxnfufunezn/qtile,frostidaho/qtile,dequis/qtile,cortesi/qtile,apinsard/qtile,kseistrup/qtile,StephenBarnes/qtile,kynikos/qtile,frostidaho/qtile,de-vri-es/qtile,apinsard/qtile,rxcomm/qtile,nxnfufunezn/qtile,flacjacket/qtile,tych0/qtile,aniruddhkanojia/qtile,zordsdavini/qtile,farebord/qtile,qtile/qtile,kopchik/qtile,ramnes/qtile,EndPointCorp/qtile,xplv/qtile,w1ndy/qtile,kiniou/qtile,dequis/qtile,rxcomm/qtile,kopchik/qtile,kynikos/qtile,soulchainer/qtile,cortesi/qtile,xplv/qtile,kseistrup/qtile,qtile/qtile