In the 2012_11 Ørsted release the support_old_CalcTmunu_mechanism was deprecated #1105 and has been up for removal since them.

Removing this mechanism is beneficial since the mechanism relied on USES INCLUDE headers which were used in inner loops and contained CCTK_IsThornActive call which would execute in each inner loop iteration (see meeting minutes http://lists.einsteintoolkit.org/pipermail/users/2013-December/003343.html for 2013-12-02).

Pull request https://bitbucket.org/einsteintoolkit/einsteinbase/pull-requests/2/tmunubase-remove-deprecated-support-for finally removes it

Associated pull requests to handle thorns that used this functionality (Exact) and would not show up in Tmunu anymore are in comments below.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2448/remove-deprecated-calctumun-support-from