Don't use new() in utils.py

Author: MightyCreak

src/diffuse/utils.py

@@ -57,7 +57,7 @@ def __init__(self, parent: Gtk.Widget, message_type: Gtk.MessageType, s: str) ->
 class EncodingMenu(Gtk.Box):
     def __init__(self, prefs: Preferences, autodetect: bool = False) -> None:
         Gtk.Box.__init__(self, orientation=Gtk.Orientation.HORIZONTAL)
-        self.combobox = combobox = Gtk.ComboBoxText.new()
+        self.combobox = combobox = Gtk.ComboBoxText()
         self.encodings = prefs.getEncodings()[:]
         for e in self.encodings:
             combobox.append_text(e)