RHINENG-25740: remove unused mark_systems_stale()

Author: MichaelMraka

database_admin/schema/create_schema.sql

@@ -356,30 +356,6 @@ BEGIN
 END;
 $delete_system$ LANGUAGE 'plpgsql';
 
-CREATE OR REPLACE FUNCTION mark_stale_systems(mark_limit integer)
-    RETURNS INTEGER
-AS
-$fun$
-DECLARE
-    marked integer;
-BEGIN
-    WITH ids AS (
-        SELECT rh_account_id, id, stale_warning_timestamp < now() as expired
-        FROM system_inventory
-        WHERE stale != (stale_warning_timestamp < now())
-        ORDER BY rh_account_id, id FOR UPDATE OF system_inventory
-        LIMIT mark_limit
-    )
-    UPDATE system_inventory si
-    SET stale = ids.expired
-    FROM ids
-    WHERE si.rh_account_id = ids.rh_account_id
-      AND si.id = ids.id;
-    GET DIAGNOSTICS marked = ROW_COUNT;
-    RETURN marked;
-END;
-$fun$ LANGUAGE plpgsql;
-
 CREATE OR REPLACE FUNCTION hash_partition_id(id int, parts int)
     RETURNS int AS
 $$