refactor: remove legacy Obsidian connector support

surfsense_backend/app/tasks/celery_tasks/connector_tasks.py

@@ -883,49 +883,6 @@ async def _index_bookstack_pages(
         )
 
 
-@celery_app.task(name="index_obsidian_vault", bind=True)
-def index_obsidian_vault_task(
-    self,
-    connector_id: int,
-    search_space_id: int,
-    user_id: str,
-    start_date: str,
-    end_date: str,
-):
-    """Celery task to index Obsidian vault notes."""
-    import asyncio
-
-    loop = asyncio.new_event_loop()
-    asyncio.set_event_loop(loop)
-
-    try:
-        loop.run_until_complete(
-            _index_obsidian_vault(
-                connector_id, search_space_id, user_id, start_date, end_date
-            )
-        )
-    finally:
-        loop.close()
-
-
-async def _index_obsidian_vault(
-    connector_id: int,
-    search_space_id: int,
-    user_id: str,
-    start_date: str,
-    end_date: str,
-):
-    """Index Obsidian vault with new session."""
-    from app.routes.search_source_connectors_routes import (
-        run_obsidian_indexing,
-    )
-
-    async with get_celery_session_maker()() as session:
-        await run_obsidian_indexing(
-            session, connector_id, search_space_id, user_id, start_date, end_date
-        )
-
-
 @celery_app.task(name="index_composio_connector", bind=True)
 def index_composio_connector_task(
     self,