Remove TDMGCC part in install docs
Remove TDMGCC part in install docs

No longer necessary since ditching openmp

eusoubrasileiro/fatiando,cmeessen/fatiando,rafaelmds/fatiando,fatiando/fatiando,victortxa/fatiando,santis19/fatiando,rafaelmds/fatiando,drandykass/fatiando,eusoubrasileiro/fatiando,fatiando/fatiando,cmeessen/fatiando,santis19/fatiando,victortxa/fatiando,drandykass/fatiando,eusoubrasileiro/fatiando_seismic,eusoubrasileiro/fatiando,eusoubrasileiro/fatiando_seismic,mtb-za/fatiando,mtb-za/fatiando