Remove archiver progress "data processed" bandwith
Remove archiver progress "data processed" bandwith

This commit removes the bandwidth displayed during backup process. It is
misleading and seldomly correct, because it's neither the "read
bandwidth" (only for the very first backup) nor the "upload bandwidth".
Many users are confused about (and rightly so), c.f. #1581, #1033, #1591

We'll eventually replace this display with something more relevant when
 #1494 is done.

restic/restic,middelink/restic,kurin/restic,restic/restic,kurin/restic,middelink/restic