Remove python-pip package.
Remove python-pip package.

Various distributions offer older pip versions that do not support the
version parameter

kdmurray91/ooni-probe,Karthikeyan-kkk/ooni-probe,lordappsec/ooni-probe,kdmurray91/ooni-probe,juga0/ooni-probe,lordappsec/ooni-probe,0xPoly/ooni-probe,lordappsec/ooni-probe,0xPoly/ooni-probe,0xPoly/ooni-probe,0xPoly/ooni-probe,kdmurray91/ooni-probe,Karthikeyan-kkk/ooni-probe,juga0/ooni-probe,Karthikeyan-kkk/ooni-probe,juga0/ooni-probe,Karthikeyan-kkk/ooni-probe,lordappsec/ooni-probe,juga0/ooni-probe,kdmurray91/ooni-probe