Remove old redirect tests that were migrated to El Proxito
Remove old redirect tests that were migrated to El Proxito

Most of these files were migrated to
`readthedocs/proxito/tests/test_old_redirects.py` and they are using the new
settings and behaves according production.

We could remove this file (`readthedocs/rtd_tests/tests/test_redirects.py`)
completely probably. For now, I'm just removing the tests that are failing, tho

rtfd/readthedocs.org,rtfd/readthedocs.org,rtfd/readthedocs.org,rtfd/readthedocs.org