diff --git a/mautrix_telegram/config.py b/mautrix_telegram/config.py
index d974a9e1..8a6a9149 100644
--- a/mautrix_telegram/config.py
+++ b/mautrix_telegram/config.py
@@ -35,12 +35,6 @@ Permissions = NamedTuple(
 
 
 class Config(BaseBridgeConfig):
-    def __getitem__(self, key: str) -> Any:
-        try:
-            return os.environ[f"MAUTRIX_TELEGRAM_{key.replace('.', '_').upper()}"]
-        except KeyError:
-            return super().__getitem__(key)
-
     @property
     def forbidden_defaults(self) -> List[ForbiddenDefault]:
         return [