remove py25 on tox file
remove py25 on tox file

ifduyue/bottle,taisa007/bottle-ja,SmithSamuelM/bottle,oz123/bottle,catroot/bottle,ifduyue/bottle,taisa007/bottle-ja,fkazimierczak/bottle,fkazimierczak/bottle,bottlepy/bottle,Inndy/bottle,catroot/bottle,defnull/bottle,defnull/bottle,SmithSamuelM/bottle,bottlepy/bottle,Inndy/bottle,hkmshb/bottle,oz123/bottle,hkmshb/bottle