Remove type hint

Author: colesbury

Tools/gdb/libpython.py

@@ -1252,7 +1252,7 @@ def print_traceback(self):
                      lineno,
                      self.co_name.proxyval(visited)))
 
-    def print_traceback_until_shim(self, frame_index: int | None = None):
+    def print_traceback_until_shim(self, frame_index = None):
         # Print traceback for _PyInterpreterFrame and return previous frame
         interp_frame = self
         while True: