[IMP] core: simplified error message

-> 1 less translation
-> the first part of the message didn't add anything useful

closes odoo/odoo#54118

Related: odoo/enterprise#11676
Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>

odoo/models.py

@@ -3285,7 +3285,7 @@ Record ids: %(records)s
             return
         _logger.info('Failed operation on deleted record(s): %s, uid: %s, model: %s', operation, self._uid, self._name)
         raise MissingError(
-            _('Missing document(s)') + ':' + _('One of the documents you are trying to access has been deleted, please try again after refreshing.')
+            _('One of the documents you are trying to access has been deleted, please try again after refreshing.')
             + '\n\n({} {}, {} {}, {} {}, {} {})'.format(
                 _('Document type:'), self._name, _('Operation:'), operation,
                 _('Records:'), invalid.ids[:6], _('User:'), self._uid,