Comment (by Roland Haas):

Note that the code was rejected for the 2020_05 release since it requires retiring a parameter, which (per policy provided in the ticket #2300) requires deprecation of the parameter one release in advance. After that it can be removed. At this point the deprecation notice would have to be included in 2021_05 and the parameter can be remove in 2021_11 (or the deprecation could have been included in 2020_11 and removed in 2021_05, but no action was taken).

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2514/broken-support-for-piecewise-polytropes-in