mpiexec and PMPI_ falsely appearing in the function index

[mahermanns]

Problem

mpiexec, mpirun and PMPI_ are not functions and should not be in the function index
several other PMPI_XXX functions are in the function index, yet their MPI_XXX counterparts are already listed in the function listed.

Proposal

Remove them from the function index.

Changes to the Text

tbd.

Impact on Implementations

None

Impact on Users

Less confusion; cleaner index

References and Pull Requests

[abouteiller]

I can help look at the mpiexec/mpirun term index, I think I wrote the problem text.

[mahermanns]

@abouteiller I took the liberty to create a branch with changes needed to remove all offending entries from the function index.

However, while it does not make sense to have specific PMPI functions referenced, yet I wonder whether we should enter some special terms index entries there instead, such as \mpitermindex{profiling interface!Intercepting Fortran 2008 procedures}.

What do you think?