Remove empty __init__ methods (#8816)

stdlib/sre_parse.pyi

@@ -27,7 +27,6 @@ class _State:
     groupdict: dict[str, int]
     groupwidths: list[int | None]
     lookbehindgroups: int | None
-    def __init__(self) -> None: ...
     @property
     def groups(self) -> int: ...
     def opengroup(self, name: str | None = ...) -> int: ...