Remove the universal bdist_wheel option in setup.py

[ericapisani]

It was used to create universal wheels for Python 2/3 compatibility, but with us removing support for Python 2, this is no longer needed.

See https://github.com/getsentry/sentry-python/pull/6091/changes#diff-60f61ab7a8d1910d86d9fda2261620314edcae5894d5aaa236b821c7256badd7L116 and https://github.com/getsentry/sentry-python/pull/6091/changes#diff-7e70ff6e695f16df0ee15fc4180df15b989e841f986dc46cc531e7d0c5807554R52

[linear-code]

PY-2385