docs: downloads: remove links to libvirt.org mirrors
docs: downloads: remove links to libvirt.org mirrors

While the mirrors themselves are still available, the gitweb
interface on libvirt.org has been disabled.

The mirrors can still be accessible via, e.g.:

  git clone https://libvirt.org/git/libvirt-python.git

But such link gives a 404 error. Remove the links from the website
to avoid confusion.

Signed-off-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>
Reviewed-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

zippy2/libvirt,jfehlig/libvirt,crobinso/libvirt,olafhering/libvirt,olafhering/libvirt,crobinso/libvirt,olafhering/libvirt,libvirt/libvirt,libvirt/libvirt,libvirt/libvirt,crobinso/libvirt,zippy2/libvirt,jfehlig/libvirt,jfehlig/libvirt,libvirt/libvirt,crobinso/libvirt,zippy2/libvirt,zippy2/libvirt,jfehlig/libvirt,olafhering/libvirt