Revert "Fix PaymentAmountSerializer min_value that was not Decimal" (#…

…3749)

This reverts commit 17ebc7b.

It broke API docs, unfortunately.

website/sales/api/v2/admin/serializers/shift.py

@@ -1,5 +1,3 @@
-from decimal import Decimal
-
 from rest_framework import serializers
 
 from payments.api.v2.serializers.payment_amount import PaymentAmountSerializer
@@ -44,8 +42,8 @@ class Meta:
             "product_sales",
         )
 
-    total_revenue = PaymentAmountSerializer(min_value=Decimal(0), read_only=True)
-    total_revenue_paid = PaymentAmountSerializer(min_value=Decimal(0), read_only=True)
+    total_revenue = PaymentAmountSerializer(min_value=0, read_only=True)
+    total_revenue_paid = PaymentAmountSerializer(min_value=0, read_only=True)
 
     products = ProductListItemSerializer(
         source="product_list.product_items", many=True, read_only=True