Revert "deploy: install Python 3 pip"
Revert "deploy: install Python 3 pip"

This reverts commit d21ca3fe03ccbf2da53ecc72d2640c3cd8077962.

This broke deploy to RHEL 7, which next.patchew.org is on.

python3-pip is not available on RHEL 7. It's called python34-pip.

Signed-off-by: Fam Zheng <df9fd617995bad07eac70e27aa3fe5069270e3bd@redhat.com>

patchew-project/patchew,patchew-project/patchew,patchew-project/patchew,patchew-project/patchew