Avoid ci-management archiving files twice

https://gerrit.fd.io/r/20119
has changed the way archival works,
everything should now go to logs.fd.io
(instead of appearing on run page in jenkins.fd.io).

The glob pattern for archiving is quite eager,
doing recursive search. That is good, as it can find
also misplaced useful outputs.
But it also means our usage of copy_archives function
creates two copies of archived directories,
usually archives/ and archives/archive/.

This change simply removes copy_archives,
relying on the new recursive search.

A solution with changing ARCHIVE_DIR and moving if needed
would be better, but looking at amout of jobs
and various func bootstraps, it is not worth the effort.

Change-Id: Iad2bc09455944307e59eecafa64d1db6dc8befe8
Signed-off-by: Vratko Polak <vrpolak@cisco.com>