Remove old markdown file. New one (README.md) will be updated soon

Change-Id: I73abd2e85ba17d33d350fe0bc530bd2356c1d7cc
Reviewed-on: http://review.couchbase.org/42412
Tested-by: Jeffry Morris <jeffrymorris@gmail.com>
Reviewed-by: Simon Baslé <simon@couchbase.com>