diff --git a/IPython/terminal/shortcuts.py b/IPython/terminal/shortcuts.py
index e44e342..24224d4 100644
--- a/IPython/terminal/shortcuts.py
+++ b/IPython/terminal/shortcuts.py
@@ -250,7 +250,6 @@ def newline_autoindent_outer(inputsplitter) -> Callable[..., None]:
 
 
 def open_input_in_editor(event):
-    event.app.current_buffer.tempfile_suffix = ".py"
     event.app.current_buffer.open_in_editor()