Revert "travis-ci: workaround for "
Revert "travis-ci: workaround for "

Now the issue was fixed. No need for the workaround:

https://github.com/kr/text/issues/6

This reverts commit 9c8dca5b697a49611fd780204abf77947fe16f12.

a16/gobgp,j-kato/gobgp,a16/gobgp,a16/gobgp,ishidawataru/gobgp,tamihiro/gobgp,osrg/gobgp,fujita/gobgp,Dipsingh/gobgp,tamihiro/gobgp,osrg/gobgp,ishidawataru/gobgp,a16/gobgp,osrg/gobgp,Dipsingh/gobgp,j-kato/gobgp,a16/gobgp,YujiOshima/gobgp,ramrunner/gobgp,a16/gobgp,YujiOshima/gobgp,fujita/gobgp,tamihiro/gobgp,a16/gobgp,j-kato/gobgp,fujita/gobgp,fujita/gobgp,ramrunner/gobgp,Dipsingh/gobgp,ishidawataru/gobgp,ramrunner/gobgp,tamihiro/gobgp,YujiOshima/gobgp,osrg/gobgp