Please remove pip from requirements.txt

[aaugustin]

Having pip in requirements.txt is causing an extra copy of pip to be installed in a virtualenv, while I already have it at the system level. This adds 8,4MB to the size of a container image I'm building for no good reason. Most likely anyone who's able to use requirements.txt already has pip installed so it should be safe to remove it.

[adi-]

Good point. Will be removed in next version.

[2w3]

I was remove pip at requirements.txt and sent PR by this Issue.

https://github.com/neutronX/django-markdownx/pull/148

[adi-]

Already in master