remove some travis cache directories
remove some travis cache directories

rmacklin/babel,vhf/babel,jridgewell/babel,CrocoDillon/babel,babel/babel,kellyselden/babel,kassens/babel,Skillupco/babel,kpdecker/babel,maurobringolf/babel,kaicataldo/babel,kellyselden/babel,dekelcohen/babel,benjamn/babel,vhf/babel,zjmiller/babel,krasimir/babel,existentialism/babel,zertosh/babel,claudiopro/babel,iamchenxin/babel,dekelcohen/babel,krasimir/babel,jchip/babel,existentialism/babel,hulkish/babel,mrtrizer/babel,babel/babel,KunGha/babel,tikotzky/babel,chicoxyzzy/babel,shuhei/babel,kedromelon/babel,lxe/babel,PolymerLabs/babel,kaicataldo/babel,iamstarkov/babel,zertosh/babel,fabiomcosta/babel,bcoe/babel,ccschneidr/babel,chicoxyzzy/babel,iamchenxin/babel,DmitrySoshnikov/babel,hzoo/babel,KunGha/babel,chicoxyzzy/babel,zjmiller/babel,existentialism/babel,Skillupco/babel,DmitrySoshnikov/babel,iamstarkov/babel,guybedford/babel,babel/babel,jhen0409/babel,Industrial/babel,rmacklin/babel,benjamn/babel,shuhei/babel,hulkish/babel,jridgewell/babel,vadzim/babel,guybedford/babel,hulkish/babel,hzoo/babel,antn/babel,kedromelon/babel,Skillupco/babel,jhen0409/babel,babel/babel,ccschneidr/babel,lxe/babel,chicoxyzzy/babel,maurobringolf/babel,maurobringolf/babel,dustyjewett/babel-plugin-transform-es2015-modules-commonjs-ember,kaicataldo/babel,kassens/babel,CrocoDillon/babel,kpdecker/babel,vadzim/babel,fabiomcosta/babel,guybedford/babel,mrtrizer/babel,kellyselden/babel,PolymerLabs/babel,jridgewell/babel,bcoe/babel,PolymerLabs/babel,samwgoldman/babel,ameyms/babel,hzoo/babel,hulkish/babel,kellyselden/babel,jchip/babel,iamchenxin/babel,garyjN7/babel,zenparsing/babel,kaicataldo/babel,claudiopro/babel,tikotzky/babel,antn/babel,AgentME/babel,jridgewell/babel,Industrial/babel,shuhei/babel,samwgoldman/babel,samwgoldman/babel,kedromelon/babel,zenparsing/babel,STRML/babel,hzoo/babel,AgentME/babel,Skillupco/babel,garyjN7/babel,claudiopro/babel,STRML/babel,ameyms/babel