removing unneeded import.

src/message/show_messages.py

@@ -1,4 +1,3 @@
-from message.message import Message
 from message.translation_edit import AddTranslation, EditTranslation
 from message.simple_messages import ClickMessage
 
@@ -76,4 +75,4 @@ class ShowEntryLabelsEdit(ClickMessage):
     def update_model(self, model):
         model.entry.make_copy()
         model.modal_set(lambda: modals.edit_entry_labels(model.entry))
-
+