[FIX] website_sale: product attribute, value, price ACLs

When a model is regarded as public readable, no group should be set on the ACL,
to allow ANYONE to read the model, not just the users within the public group.

addons/website_sale/security/ir.model.access.csv

@@ -10,7 +10,7 @@ access_product_pricelist_item_public,product.pricelist.item.public,product.model
 access_product_product_price_type_public,product.price.type.public,product.model_product_price_type,,1,0,0,0
 access_product_style,product.style.public,website_sale.model_product_style,,1,0,0,0
 access_product_supplierinfo,product.supplierinfo.public,product.model_product_supplierinfo,,1,0,0,0
-access_product_attribute_public,product.attribute public,product.model_product_attribute,base.group_public,1,0,0,0
-access_product_attribute_value_public,product.attribute value public,product.model_product_attribute_value,base.group_public,1,0,0,0
-access_product_attribute_price_public,product.attribute price public,product.model_product_attribute_price,base.group_public,1,0,0,0
-access_product_attribute_line_public,product.attribute line public,product.model_product_attribute_line,base.group_public,1,0,0,0
+access_product_attribute_public,product.attribute public,product.model_product_attribute,,1,0,0,0
+access_product_attribute_value_public,product.attribute value public,product.model_product_attribute_value,,1,0,0,0
+access_product_attribute_price_public,product.attribute price public,product.model_product_attribute_price,,1,0,0,0
+access_product_attribute_line_public,product.attribute line public,product.model_product_attribute_line,,1,0,0,0