Revert "MB-6726: decrease overhead of capi_set_view_manager"

This reverts commit c3e2d76b4360d2a50a4ca82f38bdf6afd6fca720.

Thinking about this more. I think not unly I bended stable branch
rules a bit too far, but I also forgot to update commit message.

Change-Id: I81e2585ed87a6242c461340aa509afe64cb42c4e
Reviewed-on: http://review.couchbase.org/23693
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>