Revert "[FIX] purchase: fix dropship use case in anglo saxon with perpetual valuation."

This reverts commit a57b10db. This has to be fixed in 8.0, and moreover it uses fields defined in sale only so the fix must be done in stock_dropshipping module

addons/purchase/invoice.py

@@ -113,15 +113,6 @@ class AccountInvoice(models.Model):
                     res.extend(self._anglo_saxon_purchase_move_lines(i_line, res))
         return res
 
-    @api.model
-    def _anglo_saxon_sale_move_lines(self, i_line):
-        for sale_line in i_line.sale_line_ids:
-            for proc in sale_line.procurement_ids:
-                if proc.purchase_line_id:
-                    #if the invoice line is related to sale order lines having one of its procurement_ids with a purchase_line_id set, it means that it is a confirmed dropship and in that case we mustn't create the cost of sale line (because the product won't enter the stock)
-                    return []
-        return super(AccountInvoice, self)._anglo_saxon_sale_move_lines(i_line)
-
     @api.model
     def _anglo_saxon_purchase_move_lines(self, i_line, res):
         """Return the additional move lines for purchase invoices and refunds.