Remove temporary manifest

The manifest is no longer needed now that branch-master.xml
reflects its name

Change-Id: I47a4b1cefcd299ae23a977cff8dbbe38ab289cbc
Reviewed-on: http://review.couchbase.org/40962
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>