Do not inherit access rights from product and template for product supplier and customer

issue11580
review449121003

product.py

@@ -295,11 +295,6 @@ class ProductSupplier(
     uom = fields.Function(
         fields.Many2One('product.uom', "UOM"), 'on_change_with_uom')
 
-    @classmethod
-    def __setup__(cls):
-        super().__setup__()
-        cls.__access__.update(['product', 'template'])
-
     @classmethod
     def __register__(cls, module_name):
         transaction = Transaction()