Remove explicit inheritance from object (#7468)

stubs/paramiko/paramiko/pipe.pyi

@@ -11,7 +11,7 @@ class _Pipe(_BasePipe, Protocol):
 
 def make_pipe() -> _Pipe: ...
 
-class PosixPipe(object):
+class PosixPipe:
     def __init__(self) -> None: ...
     def close(self) -> None: ...
     def fileno(self) -> int: ...
@@ -19,7 +19,7 @@ class PosixPipe(object):
     def set(self) -> None: ...
     def set_forever(self) -> None: ...
 
-class WindowsPipe(object):
+class WindowsPipe:
     def __init__(self) -> None: ...
     def close(self) -> None: ...
     def fileno(self) -> int: ...