Remove TODO comment about SYN-490 as it's unlikely to matter for v1; we'll fix it in v2

specification/server_server_api.rst

@@ -671,10 +671,6 @@ responds to the joining server with the full set of state for the newly-joined
 room. This is returned as a two-element list, whose first element is the
 integer 200, and whose second element contains the following keys:
 
-.. TODO-spec
-  - This is likely an implementation bug; see SYN-490. This should probably
-    actually just return the object directly
-
 ============== ===== ============
  Key            Type  Description
 ============== ===== ============