Use TypeAlias for type aliases where possible, part II (#7667)

stdlib/nntplib.pyi

@@ -3,6 +3,7 @@ import socket
 import ssl
 import sys
 from _typeshed import Self
+from builtins import list as _list  # conflicts with a method named "list"
 from collections.abc import Iterable
 from typing import IO, Any, NamedTuple
 from typing_extensions import Literal, TypeAlias
@@ -46,8 +47,6 @@ class ArticleInfo(NamedTuple):
 
 def decode_header(header_str: str) -> str: ...
 
-_list = list  # conflicts with a method named "list"
-
 class NNTP:
     encoding: str
     errors: str