Remove unused store method _set_destination_retry_timings_emulated. (…

…#15266)

changelog.d/15266.misc

@@ -0,0 +1 @@
+Remove unused store method `_set_destination_retry_timings_emulated`.

synapse/storage/databases/main/transactions.py

@@ -224,15 +224,15 @@ async def set_destination_retry_timings(
 
         await self.db_pool.runInteraction(
             "set_destination_retry_timings",
-            self._set_destination_retry_timings_native,
+            self._set_destination_retry_timings_txn,
             destination,
             failure_ts,
             retry_last_ts,
             retry_interval,
             db_autocommit=True,  # Safe as it's a single upsert
         )
 
-    def _set_destination_retry_timings_native(
+    def _set_destination_retry_timings_txn(
         self,
         txn: LoggingTransaction,
         destination: str,
@@ -266,58 +266,6 @@ def _set_destination_retry_timings_native(
             txn, self.get_destination_retry_timings, (destination,)
         )
 
-    def _set_destination_retry_timings_emulated(
-        self,
-        txn: LoggingTransaction,
-        destination: str,
-        failure_ts: Optional[int],
-        retry_last_ts: int,
-        retry_interval: int,
-    ) -> None:
-        self.database_engine.lock_table(txn, "destinations")
-
-        # We need to be careful here as the data may have changed from under us
-        # due to a worker setting the timings.
-
-        prev_row = self.db_pool.simple_select_one_txn(
-            txn,
-            table="destinations",
-            keyvalues={"destination": destination},
-            retcols=("failure_ts", "retry_last_ts", "retry_interval"),
-            allow_none=True,
-        )
-
-        if not prev_row:
-            self.db_pool.simple_insert_txn(
-                txn,
-                table="destinations",
-                values={
-                    "destination": destination,
-                    "failure_ts": failure_ts,
-                    "retry_last_ts": retry_last_ts,
-                    "retry_interval": retry_interval,
-                },
-            )
-        elif (
-            retry_interval == 0
-            or prev_row["retry_interval"] is None
-            or prev_row["retry_interval"] < retry_interval
-        ):
-            self.db_pool.simple_update_one_txn(
-                txn,
-                "destinations",
-                keyvalues={"destination": destination},
-                updatevalues={
-                    "failure_ts": failure_ts,
-                    "retry_last_ts": retry_last_ts,
-                    "retry_interval": retry_interval,
-                },
-            )
-
-        self._invalidate_cache_and_stream(
-            txn, self.get_destination_retry_timings, (destination,)
-        )
-
     async def store_destination_rooms_entries(
         self,
         destinations: Iterable[str],