Function hal_signal_delete 

pub unsafe extern "C" fn hal_signal_delete(
    name: *const c_char,
) -> c_int

‘hal_signal_delete()’ deletes a signal object. Any pins linked to the object are unlinked. ‘name’ is the name of the signal to be deleted. If successful, ‘hal_signal_delete()’ returns 0. On failure, it returns a negative error code.