MB-24309: Remove comment about Greenstack
MB-24309: Remove comment about Greenstack

Change-Id: I8da51b9fd42f770060016e2176916d7055267613
Reviewed-on: http://review.couchbase.org/82035
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Oliver Downard <2b519a6943d9144e0afb0b62d71fdc5e98fa8017@couchbase.com>

daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine