Drop unused function signature of create_item (#876)

We only use create_item at a single location. It uses the function signature with integer[] at the end.

prisma/migrations/20240224220605_remove_unused_create_item_function/migration.sql

@@ -0,0 +1,3 @@
+-- drop unused create_item function
+
+DROP FUNCTION IF EXISTS create_item(jsonb, jsonb, jsonb, interval);