Revert "Allow room moderators to view redacted event content"

This reverts commit 2dc2979af5.

The feature was merged to upstream, and merging upstream will be cleaner
without this commit here.

synapse/handlers/events.py

@@ -21,7 +21,6 @@ from synapse.api.errors import AuthError, SynapseError
 from synapse.events import EventBase
 from synapse.events.utils import SerializeEventConfig
 from synapse.handlers.presence import format_user_presence_state
-from synapse.storage.databases.main.events_worker import EventRedactBehaviour
 from synapse.streams.config import PaginationConfig
 from synapse.types import JsonDict, UserID
 from synapse.visibility import filter_events_for_client
@@ -140,11 +139,7 @@ class EventHandler:
         self.storage = hs.get_storage()
 
     async def get_event(
-        self,
-        user: UserID,
-        room_id: Optional[str],
-        event_id: str,
-        show_redacted: bool = False,
+        self, user: UserID, room_id: Optional[str], event_id: str
     ) -> Optional[EventBase]:
         """Retrieve a single specified event.
 
@@ -153,7 +148,6 @@ class EventHandler:
             room_id: The expected room id. We'll return None if the
                 event's room does not match.
             event_id: The event ID to obtain.
-            show_redacted: Should the full content of redacted events be returned?
         Returns:
             An event, or None if there is no event matching this ID.
         Raises:
@@ -161,12 +155,7 @@ class EventHandler:
             AuthError if the user does not have the rights to inspect this
             event.
         """
-        redact_behaviour = (
-            EventRedactBehaviour.AS_IS if show_redacted else EventRedactBehaviour.REDACT
-        )
-        event = await self.store.get_event(
-            event_id, check_room_id=room_id, redact_behaviour=redact_behaviour
-        )
+        event = await self.store.get_event(event_id, check_room_id=room_id)
 
         if not event:
             return None