Remove some outdated stuff from the v3 docs

- The space supporter role is not under development anymore.
- The kpack lifecycle type has been removed.

docs/v3/source/includes/concepts/_lifecycles.md.erb

@@ -7,7 +7,7 @@ pull a Docker image from a registry to run an app.
 
 Name | Type | Description
 ---- | ---- | -----------
-**type** | _string_ | Type of the lifecycle; valid values are `buildpack`, `docker`, `kpack`
+**type** | _string_ | Type of the lifecycle; valid values are `buildpack`, `docker`
 **data** | _object_ | Data that is used during staging and running for a lifecycle
 
 ### Buildpack lifecycle

docs/v3/source/includes/resources/roles/_get.md.erb

@@ -46,4 +46,4 @@ Org Billing Manager | Can only see organization roles in billing-managed organiz
 Space Auditor | Can see roles in audited spaces or parent organizations
 Space Developer | Can see roles in developed spaces or parent organizations
 Space Manager | Can see roles in managed spaces or parent organizations
-[Space Supporter](#valid-role-types) (*under development*) | Can see roles in supported spaces or parent organizations
+Space Supporter | Can see roles in supported spaces or parent organizations