Minor changes to sympy kernel (removing un-needed comments).
Minor changes to sympy kernel (removing un-needed comments).

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