Clear out BBS API endpoints from deprecation.md
Clear out BBS API endpoints from deprecation.md

Since diego 2.0.0, those endpoints have all been removed.

Signed-off-by: Stephane Jolicoeur <cd2742f5f5d6c8654adbc4b36f13fda4256e0aed@pivotal.io>

cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release