Function ergo::ergo_lib_ergo_box_candidate_builder_delete_register_value

#[no_mangle]
pub unsafe extern "C" fn ergo_lib_ergo_box_candidate_builder_delete_register_value(
    builder_mut: ErgoBoxCandidateBuilderPtr,
    register_id: NonMandatoryRegisterId
)

Delete register value(make register empty) for the given register id (R4-R9)