Revert "MB-8531: Implement initial index build"

This reverts commit ad3f92ab68908a4294c09ea97a1aff3c9a140fde

Accidentally an old version was merged.

Change-Id: Ia82fc23148e94b21f9e63f496ab8b7e4890cce57
Reviewed-on: http://review.couchbase.org/27572
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Tested-by: Volker Mische <volker.mische@gmail.com>