Sema: fix single-range switch prong capture (for real this time)

e2338edb47 didn't *quite* do it, the call sites of all switch prong related
functions now have to do their part too and be a little more precise about
what kind of prong they're currently analyzing.

Also removes some unused/unnecessary stuff.
044ba3e0b0Justus Klausecker committed on 1/13/2026, 5:03:07 AM· committed by Alex Rønne Petersenparent4fcf650
3 files changedLine totals unavailable