ipaddress: Remove non-existent ip_str param from docstring (#103461)

Author: kit1980

Lib/ipaddress.py

@@ -1821,9 +1821,6 @@ def _string_from_ip_int(cls, ip_int=None):
     def _explode_shorthand_ip_string(self):
         """Expand a shortened IPv6 address.
 
-        Args:
-            ip_str: A string, the IPv6 address.
-
         Returns:
             A string, the expanded IPv6 address.