remove 3rd overload

Co-authored-by: Semyon Moroz <donbarbos@proton.me>

Author: mr-c

stubs/psutil/psutil/__init__.pyi

@@ -202,8 +202,6 @@ class Process:
         def cpu_affinity(self, cpus: None) -> list[int]: ...
         @overload
         def cpu_affinity(self, cpus: list[int]) -> None: ...
-        @overload
-        def cpu_affinity(self, cpus: list[int] | None = None) -> list[int] | None: ...
         def memory_maps(self, grouped: bool = True): ...
     if sys.platform == "linux":
         def rlimit(self, resource: int, limits: tuple[int, int] | None = ...) -> tuple[int, int]: ...