Remove user-visible groups/communities code (#12553)

Makes it so that groups/communities no longer exist from a user-POV. E.g. we remove:

* All API endpoints (including Client-Server, Server-Server, and admin).
* Documented configuration options (and the experimental flag, which is now unused).
* Special handling during room upgrades.
* The `groups` section of the `/sync` response.

1 files changed, 0 insertions, 19 deletions

diff --git a/docs/usage/configuration/config_documentation.md b/docs/usage/configuration/config_documentation.md

index 0f5bda32b9..8724bf27e8 100644
--- a/docs/usage/configuration/config_documentation.md
+++ b/docs/usage/configuration/config_documentation.md
@@ -3145,25 +3145,6 @@ Example configuration:
 encryption_enabled_by_default_for_room_type: invite
 ```
 ---
-Config option: `enable_group_creation`
-
-Set to true to allow non-server-admin users to create groups on this server
-
-Example configuration:
-```yaml
-enable_group_creation: true
-```
----
-Config option: `group_creation_prefix`
-
-If enabled/present, non-server admins can only create groups with local parts
-starting with this prefix.
-
-Example configuration:
-```yaml
-group_creation_prefix: "unofficial_"
-```
----
 Config option: `user_directory`
 
 This setting defines options related to the user directory.