Comment (by Samuel Cupp):

There is no PR for this, as it involves two different repos. Please compare wvuthorns/IllinoisGRMHD and GRHayLET/IllinoisGRMHD. Connected to this are the deprecation of ID_converter_ILGRMHD and Convert_to_HydroBase and change to the manifest thornlist.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2777/upgrade-illinoisgrmhd-to-use-grhayl