clean up out of date docs
ref
@@ -10,7 +10,7 @@ API defines several resources that can be reduced down to well understood
contracts. These eventing resource interfaces may be fulfilled by other
Kubernetes objects and then composed in the same way as the concrete objects.
The interfaces are ([Addressable](interfaces.md#addressable),
-[Subscribable](interfaces.md#Subscribable), [Callable](interfaces.md#callable)).
+[Callable](interfaces.md#callable)).
For more details, see [Interface Contracts](interfaces.md).
- A **Trigger** describes a filter on event attributes which should be delivered
