remove check is taxable in sale item discount cal

app/models/sale_item.rb

@@ -95,7 +95,7 @@ class SaleItem < ApplicationRecord
       discount_account = {:name => a.title, :price => 0}
 
       # Check for actual sale items
-      sale_items.where("is_taxable = false AND remark = 'Discount'").find_each do |si|
+      sale_items.where("remark = 'Discount'").find_each do |si|
         if si.account_id == a.id
           discount_account[:price] = (discount_account[:price].abs + si.price.abs) * (-1)
         end