@milljm can you apply this patch and see if this results in libmesh still using petsc?

Feel free to tag your disable petsc nemesis

I know, I was looking forward to poking fun at @benkirk for disabling this capability in a stealth commit, but I looked back further and it turns out that when I enabled it that was also via stealth commit, so there goes my moral high ground.

At least someone's using an actual PR this time, thank you.

Eventually we ought to actually try verifying whether our PETSc was built with MPI or in serial, so we can have --disable-mpi affect the former case but not the latter.

That did not seem to do the trick...

  metaphysicl...................... : yes
  metis............................ : yes
  mpi.............................. : no
  nanoflann........................ : yes
  nemesis.......................... : no
  netcdf........................... : yes
     version....................... : 4
  nlopt............................ : no
  parmetis......................... : no
  petsc............................ : no
  qhull............................ : yes
  sfcurves......................... : no

I still want serial PETSc re-enabled, sure, but "That did not seem to do the trick..." suggested that this PR wasn't doing it, no?

I don't know if this is relevant any more