Revert "CBQE-1127 check bucket type before insert key using mc_bin_client"

This reverts commit 2a7dd34cc8961f207934294cdfa734c4bd0c09f0

MB-8595

Change-Id: I24bc698166cb104f4e84863000c9ea2f568fb084
Reviewed-on: http://review.couchbase.org/27413
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>