Revert unused refactor to get PDU raw

Code split out into https://github.com/matrix-org/synapse/pull/11242

synapse/federation/federation_client.py

@@ -277,62 +277,6 @@ class FederationClient(FederationBase):
 
         return pdus
 
-    async def get_pdu_from_destination_raw(
-        self,
-        destination: str,
-        event_id: str,
-        room_version: RoomVersion,
-        outlier: bool = False,
-        timeout: Optional[int] = None,
-    ) -> Optional[EventBase]:
-        """Requests the PDU with given origin and ID from the remote home
-        server.
-
-        Does not have any caching or rate limiting!
-
-        Args:
-            destination: Which homeserver to query
-            event_id: event to fetch
-            room_version: version of the room
-            outlier: Indicates whether the PDU is an `outlier`, i.e. if
-                it's from an arbitrary point in the context as opposed to part
-                of the current block of PDUs. Defaults to `False`
-            timeout: How long to try (in ms) each destination for before
-                moving to the next destination. None indicates no timeout.
-
-        Returns:
-            The requested PDU, or None if we were unable to find it.
-
-        Raises:
-            SynapseError, NotRetryingDestination, FederationDeniedError
-        """
-
-        signed_pdu = None
-
-        transaction_data = await self.transport_layer.get_event(
-            destination, event_id, timeout=timeout
-        )
-
-        logger.info(
-            "retrieved event id %s from %s: %r",
-            event_id,
-            destination,
-            transaction_data,
-        )
-
-        pdu_list: List[EventBase] = [
-            event_from_pdu_json(p, room_version, outlier=outlier)
-            for p in transaction_data["pdus"]
-        ]
-
-        if pdu_list and pdu_list[0]:
-            pdu = pdu_list[0]
-
-            # Check signatures are correct.
-            signed_pdu = await self._check_sigs_and_hash(room_version, pdu)
-
-        return signed_pdu
-
     async def get_pdu(
         self,
         destinations: Iterable[str],
@@ -377,14 +321,30 @@ class FederationClient(FederationBase):
                 continue
 
             try:
-                signed_pdu = await self.get_pdu_from_destination_raw(
-                    destination=destination,
-                    event_id=event_id,
-                    room_version=room_version,
-                    outlier=outlier,
-                    timeout=timeout,
+                transaction_data = await self.transport_layer.get_event(
+                    destination, event_id, timeout=timeout
                 )
 
+                logger.debug(
+                    "retrieved event id %s from %s: %r",
+                    event_id,
+                    destination,
+                    transaction_data,
+                )
+
+                pdu_list: List[EventBase] = [
+                    event_from_pdu_json(p, room_version, outlier=outlier)
+                    for p in transaction_data["pdus"]
+                ]
+
+                if pdu_list and pdu_list[0]:
+                    pdu = pdu_list[0]
+
+                    # Check signatures are correct.
+                    signed_pdu = await self._check_sigs_and_hash(room_version, pdu)
+
+                    break
+
                 pdu_attempts[destination] = now
 
             except SynapseError as e: