async def METHOD_NAME(self, *, reason: Optional[str] = None) -> None:
    """|coro|
    Deletes the stage instance.
    You must have :attr:`~Permissions.manage_channels` to do this.
    Parameters
    -----------
    reason: :class:`str`
        The reason the stage instance was deleted. Shows up on the audit log.
    Raises
    ------
    Forbidden
        You do not have permissions to delete the stage instance.
    HTTPException
        Deleting the stage instance failed.
    """
    await self._state.http.delete_stage_instance(self.channel_id, reason=reason)