Axe some dead code

app/repository/channels.py

@@ -68,31 +68,6 @@ class ChannelRepository:
             for row in rows
         ]
 
-    @staticmethod
-    async def get_on_radio() -> list[Channel]:
-        """Return channels currently marked as resident on the radio in the database."""
-        cursor = await db.conn.execute(
-            """
-            SELECT key, name, is_hashtag, on_radio, flood_scope_override, path_hash_mode_override, last_read_at
-            FROM channels
-            WHERE on_radio = 1
-            ORDER BY name
-            """
-        )
-        rows = await cursor.fetchall()
-        return [
-            Channel(
-                key=row["key"],
-                name=row["name"],
-                is_hashtag=bool(row["is_hashtag"]),
-                on_radio=bool(row["on_radio"]),
-                flood_scope_override=row["flood_scope_override"],
-                path_hash_mode_override=row["path_hash_mode_override"],
-                last_read_at=row["last_read_at"],
-            )
-            for row in rows
-        ]
-
     @staticmethod
     async def delete(key: str) -> None:
         """Delete a channel by key."""