CBD-980: Remove old 2.1.1 and 2.2.0 manifest

Remove no longer needed manifests.

Change-Id: Ia3dd7c2aaddcc7bab04dc007ad992ff5d878604e
Reviewed-on: http://review.couchbase.org/27678
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>