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, 8 deletions

diff --git a/synapse/rest/client/sync.py b/synapse/rest/client/sync.py

index e8772f86e7..f596b792fa 100644
--- a/synapse/rest/client/sync.py
+++ b/synapse/rest/client/sync.py
@@ -298,14 +298,6 @@ class SyncRestServlet(RestServlet):
         if archived:
             response["rooms"][Membership.LEAVE] = archived
 
-        if sync_result.groups is not None:
-            if sync_result.groups.join:
-                response["groups"][Membership.JOIN] = sync_result.groups.join
-            if sync_result.groups.invite:
-                response["groups"][Membership.INVITE] = sync_result.groups.invite
-            if sync_result.groups.leave:
-                response["groups"][Membership.LEAVE] = sync_result.groups.leave
-
         return response
 
     @staticmethod