Revert "MB-8348: implemented option for compactor's --evict flag"

This reverts commit fd5240abb641f8c636d879abc3872968f78a2d73.

Change-Id: I274a5177805c15d65d03a6ee6f0a80e641c82548
Reviewed-on: http://review.couchbase.org/26679
Reviewed-by: Filipe David Borba Manana <fdmanana@gmail.com>
Tested-by: Aaron Miller <apage43@ninjawhale.com>