use set comprehension

Author: aschey-forpeople

apps/bfd-pipeline-idr/loader.py

@@ -148,14 +148,14 @@ def __init__(
         # rows that are actually updated during the upsert so that last updated can be ran for
         # just rows with changes during the load
         self.updated_keys_returning_str = ", ".join(
-            set(
+            {
                 col
                 for col in [
                     *self.model.ordered_pkeys(),
                     self.model.last_updated_timestamp_col(),
                 ]
                 if col
-            )
+            }
         )
         self.timestamp_placeholders = ", ".join("%(timestamp)s" for _ in self.meta_keys)