Remove use of internal config header

Only used to get a common list of include files and defining
known sized uint variables (but with our platform lib we
have that from there)

Change-Id: I079cfbd1053cdd0badaf14a8877264d9118a1c11
Reviewed-on: http://review.couchbase.org/34623
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>