remove disclaimer from welcome screen

now that we have actual translations, this screen actually makes sense and we
can remove the stuffy "(More language choices will appear in time)" text

subiquity/ui/views/welcome.py

@@ -35,9 +35,7 @@ class WelcomeView(BaseView):
         self.model = model
         self.controller = controller
         super().__init__(ListBox([
-            Padding.center_50(self._build_model_inputs()),
-            Text(""),
-            Padding.center_79(Text(_("(More language choices will appear in time)")))]))
+            Padding.center_50(self._build_model_inputs())]))
 
     def _build_model_inputs(self):
         sl = []