Consider `python' package as built-in
Consider `python' package as built-in

Prevents cloning https://github.com/fgallina/python.el from
EmacsMirror if a package declares a dependency on `python'. Normally
we would want to clone even if the package is built-in, but in this
case the external package is actually obsolete.

raxod502/straight.el,raxod502/straight.el