MEDYAN.depolymerize_fila!Tuple{MEDYAN.Context, MEDYAN.FilaTipIdx}Remove a monomer from the end of the filament.
This doesn’t affect the other monomer states, positions, or change any of the monomer ids.
Error if the filament isn’t initially over 2 monomers long.
Unlink any monomers on the filament that are referenced by any links. The links will not be removed, but will have a null reference. Links attached to the filament tip will remain attached.