CI: Fix broken mpi4py removal step on CI

[carterbox]

Purpose

Approach

Pre-Merge Checklists

Submitter

• [ ] Write a helpfully descriptive pull request title.
• [ ] Organize changes into logically grouped commits with descriptive commit messages.
• [ ] Document all new functions.
• [ ] Click 'details' on the readthedocs check to view the updated docs.
• [ ] Write tests for new functions or explain why they are not needed.
• [ ] Address any complaints from pep8speaks.

Reviewer

• [ ] Actually read all of the code.
• [ ] Run the new code yourself; the included tests should make this easy.
• [ ] Write a summary of the changes as you understand them.
• [ ] Thank the submitter.

[pep8speaks]

Hello @carterbox! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file tests/communicators/test_comm.py:

Line 23:81: E501 line too long (82 > 80 characters)

Comment last updated at 2023-10-27 18:24:10 UTC

[carterbox]

It seems that the CUDA linalg library raises a lot of errors on the CI. I'm not sure how to fix that, so I'm ignoring it for now.