MB-10114: Don't remove items for allocation failures

The client should perform the appropriate operation

Change-Id: I79c21e607e3d39bcae543bf6ce9e96d4aeef3210
Reviewed-on: http://review.couchbase.org/33168
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>