The python-google-auth library implements a fallback mechanism wherein it tries to import signing from python-cryptography (thereby using openssl) and falling back to python-rsa.

To the extent possible, we should be eliminating usage and references to encryption libraries that are not being validated for usage in FIPS-required environments.

Since python-rsa is not going to be a supported encryption algorithm in FIPS environments and we do provide python-cryptography, we should patch the dependency out of python-google-auth.