Remove unused variable and set macro __unused to another.

[araujo]

Summary

Remove unused variable and silence the CLANG warning for variable dummy. Also remove some weird new blank lines.

[• rodrigc]

I wouldn't bother with __unused, and just take the dummy variable
out entirely.
I would confirm with @hselasky just to make sure.

[• hselasky]

Looks good.

I think we should simply "(void)" cast the unused function return values, and remove the __unused altogether.

--HPS

[araujo]

Remove the __unused dummy variable and cast the function with void.

[• hselasky]

Looks good.