update conda_install_reqs for more modern usage
update conda_install_reqs for more modern usage

There was some stuff in there that went back to parsing conda
recipees, which is now far from relevant.

openpathsampling/openpathsampling,choderalab/openpathsampling,openpathsampling/openpathsampling,dwhswenson/openpathsampling,dwhswenson/openpathsampling,dwhswenson/openpathsampling,choderalab/openpathsampling,openpathsampling/openpathsampling,choderalab/openpathsampling,openpathsampling/openpathsampling,dwhswenson/openpathsampling