Comment (by Samuel Cupp):

I had missed one file in particle_tracerET, but I have pushed that as well now. I am closing the ticket since greping for CCTK_GFINDEX4D gets nothing in wvuthorns and wvuthorns_diagnostics.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2741/some-thorns-seem-to-incorrectly-use