Rollup merge of #120917 - chenyukang:yukang-dead-parameters, r=compiler-errors

Remove a bunch of dead parameters in functions

Found this kind of issue when working on https://github.com/rust-lang/rust/pull/119650
I wrote a trivial toy lint and manual review to find these.

compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -3018,7 +3018,6 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
     /// assignment to `x.f`).
     pub(crate) fn report_illegal_reassignment(
         &mut self,
-        _location: Location,
         (place, span): (Place<'tcx>, Span),
         assigned_span: Span,
         err_place: Place<'tcx>,