1 files changed, 0 insertions, 3 deletions
diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py
index 8e0f5356b4..0970f22a75 100644
--- a/synapse/config/experimental.py
+++ b/synapse/config/experimental.py
@@ -382,9 +382,6 @@ class ExperimentalConfig(Config):
         # Check that none of the other config options conflict with MSC3861 when enabled
         self.msc3861.check_config_conflicts(self.root)
 
-        # MSC4009: E.164 Matrix IDs
-        self.msc4009_e164_mxids = experimental.get("msc4009_e164_mxids", False)
-
         # MSC4010: Do not allow setting m.push_rules account data.
         self.msc4010_push_rules_account_data = experimental.get(
             "msc4010_push_rules_account_data", False