Merge pull request #3242 from RosettaCommons/revert-3240-smlewis_for_gideonla/add_additional_protocol_data_submodule
Revert "Add additional_protocol_data as a submodule, on Gideon's behalf"
Reverts RosettaCommons/main#3240 because submodule contain LFS files (see https://github.com/RosettaCommons/additional_protocol_data/blob/master/motif_dock/.gitattributes) so it make impossible for ppl to clone it