Revert "use $GOPATH in travis-test.sh"
Revert "use $GOPATH in travis-test.sh"

This reverts commit 12aff736d81e8ada8c52bd8432473508f3f41c77.

jargv/gopherjs,govlas/gopherjs,nmfzone/gopherjs,rasata/gopherjs,govlas/gopherjs,ebroder/gopherjs,gopherjs/gopherjs,Archs/gopherjs,Yanjing123/gopherjs,flimzy/gopherjs,jargv/gopherjs,Yanjing123/gopherjs,gopherjs/gopherjs,flimzy/gopherjs,nmfzone/gopherjs,nmfzone/gopherjs,ebroder/gopherjs,albrow/gopherjs,albrow/gopherjs,Archs/gopherjs,bpowers/gopherjs,roth1002/gopherjs,roth1002/gopherjs,jeremyschlatter/gopherjs,govlas/gopherjs,gopherjs/gopherjs,bpowers/gopherjs,rasata/gopherjs,roth1002/gopherjs,gopherjs/gopherjs,ebroder/gopherjs,bpowers/gopherjs,flimzy/gopherjs,gopherjs/gopherjs,jeremyschlatter/gopherjs,jargv/gopherjs,albrow/gopherjs,Yanjing123/gopherjs,rasata/gopherjs,Archs/gopherjs,jeremyschlatter/gopherjs