removed unused posix import
removed unused posix import

PredictiveScienceLab/GPy,fivejjs/GPy,PredictiveScienceLab/GPy,buntyke/GPy,PredictiveScienceLab/GPy,SheffieldML/GPy,Dapid/GPy,befelix/GPy,jameshensman/GPy,ptonner/GPy,gusmaogabriels/GPy,dhhjx880713/GPy,esiivola/GPYgradients,ptonner/GPy,SheffieldML/GPy,fivejjs/GPy,maaskola/GPy,jameshensman/GPy,AlexGrig/GPy,avehtari/GPy,mikecroucher/GPy,befelix/GPy,ptonner/GPy,beckdaniel/GPy,SheffieldML/GPy,dhhjx880713/GPy,AlexGrig/GPy,mikecroucher/GPy,esiivola/GPYgradients,gusmaogabriels/GPy,SheffieldML/GPy,maaskola/GPy,jameshensman/GPy,ysekky/GPy,beckdaniel/GPy,buntyke/GPy,TianpeiLuke/GPy,ysekky/GPy,fivejjs/GPy,TianpeiLuke/GPy,ysekky/GPy,beckdaniel/GPy,dhhjx880713/GPy,buntyke/GPy,strongh/GPy,Dapid/GPy,strongh/GPy,beckdaniel/GPy,befelix/GPy,esiivola/GPYgradients,avehtari/GPy,Dapid/GPy,mikecroucher/GPy,strongh/GPy,Dapid/GPy,jameshensman/GPy,buntyke/GPy,gusmaogabriels/GPy,PredictiveScienceLab/GPy,befelix/GPy,TianpeiLuke/GPy,dhhjx880713/GPy,avehtari/GPy,AlexGrig/GPy,ptonner/GPy,maaskola/GPy,esiivola/GPYgradients,AlexGrig/GPy,mikecroucher/GPy,ysekky/GPy,maaskola/GPy,avehtari/GPy