Drop Python 2 support from click-spinner (#7710)

stubs/click-spinner/METADATA.toml

@@ -1,3 +1 @@
 version = "0.1.*"
-python2 = true
-requires = []

stubs/click-spinner/click_spinner/__init__.pyi

@@ -1,7 +1,8 @@
 import threading
 from _typeshed import Self
+from collections.abc import Iterator
 from types import TracebackType
-from typing import Iterator, Protocol
+from typing import Protocol
 from typing_extensions import Literal
 
 __version__: str
@@ -11,7 +12,7 @@ class _Stream(Protocol):
     def flush(self) -> None: ...
     def write(self, s: str) -> int: ...
 
-class Spinner(object):
+class Spinner:
     spinner_cycle: Iterator[str]
     disable: bool
     beep: bool