Fix #571 -- Partial payments and refunds

src/pretix/plugins/stripe/utils.py

@@ -1,6 +0,0 @@
-def refresh_order(order):
-    if not order.payment_provider.startswith('stripe_'):
-        raise ValueError("Not a stripe payment")
-
-    prov = order.event.get_payment_providers()[order.payment_provider]
-    prov._init_api()