Travis: don't extract data twice
Travis: don't extract data twice

It's now part of the cmake build, so no need to run explicitly

steveschnepp/OpenApoc,pmprog/OpenApoc,steveschnepp/OpenApoc,Istrebitel/OpenApoc,Istrebitel/OpenApoc,FranciscoDA/OpenApoc,pmprog/OpenApoc,FranciscoDA/OpenApoc,FranciscoDA/OpenApoc