Let m.notice messages mark a room as unread

The typescript conversion of Unread.js in matrix-org/matrix-react-sdk#6241
fixed a 6-year-old typo and stopped messages with msgtype=m.notice from being
counted as unread messages. This makes it very difficult to use rooms dedicated
for bot notices (like RSS or GitHub webhook bots).

Signed-off-by: Tulir Asokan <tulir@maunium.net>

src/Unread.ts

@@ -43,12 +43,6 @@ export function eventTriggersUnreadCount(ev: MatrixEvent): boolean {
         case EventType.RoomCanonicalAlias:
         case EventType.RoomServerAcl:
             return false;
-
-        case EventType.RoomMessage:
-            if (ev.getContent().msgtype === MsgType.Notice) {
-                return false;
-            }
-            break;
     }
 
     if (ev.isRedacted()) return false;