Remove auto_start option from fig.yml.

This option is redundant now that services can be started along with links.

Signed-off-by: Chris Corbyn <chris@w3style.co.uk>

docs/yml.md

@@ -54,9 +54,6 @@ expose:
 volumes:
  - cache/:/tmp/cache
 
--- Do not automatically run this service on `fig up` (default: true)
-auto_start: false
-
 -- Add environment variables.
 environment:
   RACK_ENV: development