Remove unused `start_background_update`

This was only used in a unit test, so let's just inline it in the test.

1 files changed, 0 insertions, 21 deletions

diff --git a/synapse/storage/background_updates.py b/synapse/storage/background_updates.py
index eb1a7e5002..d4e26eab6c 100644
--- a/synapse/storage/background_updates.py
+++ b/synapse/storage/background_updates.py
@@ -400,27 +400,6 @@ class BackgroundUpdater(object):
 
         self.register_background_update_handler(update_name, updater)
 
-    def start_background_update(self, update_name, progress):
-        """Starts a background update running.
-
-        Args:
-            update_name: The update to set running.
-            progress: The initial state of the progress of the update.
-
-        Returns:
-            A deferred that completes once the task has been added to the
-            queue.
-        """
-        # Clear the background update queue so that we will pick up the new
-        # task on the next iteration of do_background_update.
-        self._background_update_queue = []
-        progress_json = json.dumps(progress)
-
-        return self.db.simple_insert(
-            "background_updates",
-            {"update_name": update_name, "progress_json": progress_json},
-        )
-
     def _end_background_update(self, update_name):
         """Removes a completed background update task from the queue.