Fix jrief#220: Django 2.1 gives error due to prefilling list_display_links

Author: jrief

adminsortable2/admin.py

@@ -98,8 +98,6 @@ def __init__(self, model, admin_site):
             self.exclude = [self.default_order_field]
         elif not self.exclude or self.default_order_field != self.exclude[0]:
             self.exclude = [self.default_order_field] + list(self.exclude)
-        if not self.list_display_links:
-            self.list_display_links = (self.list_display[0],)
         self._add_reorder_method()
         self.list_display = list(self.list_display)