Replace incomplete module markers (#14030)

stubs/flake8-typing-imports/flake8_typing_imports.pyi

@@ -1,6 +1,5 @@
 import argparse
 import ast
-from _typeshed import Incomplete
 from collections.abc import Generator
 from typing import Any, ClassVar
 
@@ -14,4 +13,4 @@ class Plugin:
     def __init__(self, tree: ast.AST) -> None: ...
     def run(self) -> Generator[tuple[int, int, str, type[Any]], None, None]: ...
 
-def __getattr__(name: str) -> Incomplete: ...  # incomplete (other attributes are normally not accessed)
+def __getattr__(name: str): ...  # incomplete module (other attributes are normally not accessed)