Remove setup.py dependency on uwsgi

[danmichaelo]

This might at first sound like a silly request, but there are many ways to install uwsgi, and not all are understood by pip. If I have uwsgi installed through a package manager (apt install uwsgi uwsgi-plugin-python3 on Debian), I don't want to install another copy of uwsgi when I install Flask-uWSGI-WebSocket. Especially since uwsgi installation through pip is sometimes non-trivial, requiring a compiler and several libraries to be found.

With pip, I can use pip install Flask-uWSGI-WebSocket --no-deps to avoid uwsgi, but with pipenv no such flag seems to be available, so this is why I'm suggesting to remove uwsgi from setup.py.

[frankier]

Another reason for wanting this is that if you use async then uwsgi has to be installed like so:

CFLAGS="-I/usr/local/include/python3.7/" UWSGI_PROFILE="asyncio" pip3 install --upgrade --force-reinstall --no-binary :all: uwsgi

There is no way to instruct pipenv, or in my case, poetry to do this -- currently I am therefore always installing uwsgi twice -- first the incorrect version and then the correct version over the top.