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-rw-r--r--synapse/handlers/presence.py1
1 files changed, 0 insertions, 1 deletions
diff --git a/synapse/handlers/presence.py b/synapse/handlers/presence.py
index 6c48b1d20e..670c1d353f 100644
--- a/synapse/handlers/presence.py
+++ b/synapse/handlers/presence.py
@@ -1140,7 +1140,6 @@ class PresenceEventSource(object):
                 user_ids_to_check |= set(joined)
 
         updates = []
-        # TODO(paul): use a DeferredList ? How to limit concurrency.
         for observed_user in user_ids_to_check & set(cachemap):
             if not (to_key < cachemap[observed_user].serial <= from_key):
                 continue