Removing lurking info from public stages (discord#5768)

Author: Jupith

docs/resources/Stage_Instance.md

@@ -50,8 +50,6 @@ Below are some definitions related to stages.
   - `MOVE_MEMBERS`
 - **Topic**: This is the blurb that gets shown below the channel's name, among other places.
 - **Public**: A Stage instance is public when it has a `privacy_level` of `PUBLIC`. While a guild has a public Stage instance:
-  - The guild will be lurkable.
-  - Lurkers may join any Stage channel with a public Stage instance.
   - Users in the Stage can have the Stage show in their [activities](#DOCS_TOPICS_GATEWAY_EVENTS/presence).
   - [Invites](#DOCS_RESOURCES_INVITE/invite-object) to the Stage channel will have the `stage_instance` field.