gettext: remove the signature check for now
gettext: remove the signature check for now

The signature doesn't include the key ID which we need:
curl https://ftp.gnu.org/pub/gnu/gettext/gettext-0.19.8.1.tar.gz.sig | gpg --list-packets
JPeterMugaas/MINGW-packages,Alexpux/MINGW-packages,InitialForce/MINGW-packages,mati865/MINGW-packages,peterbud/MINGW-packages,Ede123/MINGW-packages,Chocobo1/MINGW-packages,Ede123/MINGW-packages,InitialForce/MINGW-packages,oroppas/MINGW-packages,oscarfv/MINGW-packages,oroppas/MINGW-packages,lhmouse/MINGW-packages,oroppas/MINGW-packages,Chocobo1/MINGW-packages,lhmouse/MINGW-packages,Alexpux/MINGW-packages,JPeterMugaas/MINGW-packages,lhmouse/MINGW-packages,bjlemke/MINGW-packages,nazar554/MINGW-packages,Alexpux/MINGW-packages,jtanx/MINGW-packages,lhmouse/MINGW-packages,mati865/MINGW-packages,jtanx/MINGW-packages,bjlemke/MINGW-packages,Alexpux/MINGW-packages,bjlemke/MINGW-packages,mati865/MINGW-packages,Ede123/MINGW-packages,oscarfv/MINGW-packages,oscarfv/MINGW-packages,peterbud/MINGW-packages,lhmouse/MINGW-packages,JPeterMugaas/MINGW-packages,fabiangreffrath/MINGW-packages,lhmouse/MINGW-packages,Optiligence/MINGW-packages,mati865/MINGW-packages,peterbud/MINGW-packages,fabiangreffrath/MINGW-packages,oscarfv/MINGW-packages,oroppas/MINGW-packages,Optiligence/MINGW-packages,stahta01/MINGW-packages,fabiangreffrath/MINGW-packages,bjlemke/MINGW-packages,peterbud/MINGW-packages,mati865/MINGW-packages,Ede123/MINGW-packages,jtanx/MINGW-packages,stahta01/MINGW-packages,oroppas/MINGW-packages,JPeterMugaas/MINGW-packages,Optiligence/MINGW-packages,JPeterMugaas/MINGW-packages,nazar554/MINGW-packages,jtanx/MINGW-packages,Chocobo1/MINGW-packages,Optiligence/MINGW-packages,stahta01/MINGW-packages,nazar554/MINGW-packages,JPeterMugaas/MINGW-packages,stahta01/MINGW-packages,nazar554/MINGW-packages,Alexpux/MINGW-packages,fabiangreffrath/MINGW-packages,fabiangreffrath/MINGW-packages,oroppas/MINGW-packages,oscarfv/MINGW-packages,fabiangreffrath/MINGW-packages,InitialForce/MINGW-packages,stahta01/MINGW-packages,stahta01/MINGW-packages,oscarfv/MINGW-packages,Alexpux/MINGW-packages