MB-10424: dont check compaction range

Since users can configure compaction to run overnight, it is possible
that compaction starts from 23:00 and ends at 2:00.

Change-Id: Iec2721c3bca9ee0e83efba8c234f2979f9cd14fd
Reviewed-on: http://review.couchbase.org/35684
Reviewed-by: Bin Cui <bin.cui@gmail.com>
Tested-by: Bin Cui <bin.cui@gmail.com>