[PATCH] Remove some dead code from evaluate_subexp_standard

[Tom Tromey]

Andrew> For the record index_pc was made redundant in commit:
Andrew>   commit ae8fddda32d161ea0d8606fdd71349230d5b0ad6
Andrew>   Date:   Tue Apr 15 11:28:15 2014 +0800
Andrew>       Remove operator BINOP_RANGE

Thanks for doing the archaeology.
I looked briefly but didn't see it.

Andrew> This change looks good to me, we've clearly not needed this
Andrew> functionality for the last 6 years!

Thanks, I'm going to check it in.

Tom