Remove Fedora repository fastmirror selection
Fast mirror selection somehow stopped working. If disabled, the
difference is around 20 seconds for the 'Prepare build environment' step
(2:49 versus 3:09), so while we are saving, currently it is not a lot.
Also remove explicit nodejs stream choice, it seems to be not needed
Signed-off-by: Alexander Bokovoy <email@example.com>
Reviewed-By: Armando Neto <firstname.lastname@example.org>