Remove patch 8618

This will be fixed when
https://foss.heptapod.net/tryton/tryton/-/merge_requests/538 will be
committed.

issue8618.diff

@@ -1,20 +0,0 @@
-diff -r 6597f33e51d2 invoice.py
---- a/tryton/modules/account_invoice/invoice.py	Fri Aug 09 16:33:39 2019 +0200
-+++ b/tryton/modules/account_invoice/invoice.py	Wed Aug 28 23:44:50 2019 +0200
-@@ -2657,7 +2657,7 @@ class InvoiceTax(sequence_ordered(), ModelSQL, ModelView):
-                 self.account = self.tax.credit_note_account
- 
-     @fields.depends(
--        'tax', 'base', 'amount', 'manual', 'invoice',
-+        'tax', 'base', 'manual', 'invoice',
-         '_parent_invoice.currency',
-         # From_date
-         '_parent_invoice.accounting_date', '_parent_invoice.invoice_date',
-@@ -2677,7 +2677,6 @@ class InvoiceTax(sequence_ordered(), ModelSQL, ModelView):
-                         if self.invoice.currency:
-                             amount = self.invoice.currency.round(amount)
-                         return amount
--        return self.amount
- 
-     @property
-     def _key(self):

series

@@ -5,7 +5,6 @@ tax_update_unit_price.diff # [account] Add the update_unit_price control on pare
 
 issue4506.diff # [account_invoice] Add credit invoices keyword from account.invoice
 issue8479.diff # [account_invoice] missing invoice payment method rule by company
-issue8618.diff # [account_invoice] Allow changing amount in manual invoice taxes
 analitic_line_company_rules.diff # [analytic_account] Not selected root accounts in analytic account lines
 
 sale_supply_supply_on_sale_multivalue.diff # [sale_supply] supply_on_sale field multvalue #035100