Remove an unused arg from the trait method provided_kind.

Author: nnethercote

Diff for: compiler/rustc_hir_analysis/src/hir_ty_lowering/generics.rs

@@ -273,7 +273,7 @@ pub fn lower_generic_args<'tcx: 'a, 'a>(
 
                             // We lower to an infer even when the feature gate is not enabled
                             // as it is useful for diagnostics to be able to see a `ConstKind::Infer`
-                            args.push(ctx.provided_kind(&args, param, arg));
+                            args.push(ctx.provided_kind(param, arg));
                             args_iter.next();
                             params.next();
                         }

Diff for: compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs

@@ -296,7 +296,6 @@ pub trait GenericArgsLowerer<'a, 'tcx> {
 
     fn provided_kind(
         &mut self,
-        preceding_args: &[ty::GenericArg<'tcx>],
         param: &ty::GenericParamDef,
         arg: &GenericArg<'tcx>,
     ) -> ty::GenericArg<'tcx>;
@@ -480,7 +479,6 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
 
             fn provided_kind(
                 &mut self,
-                _preceding_args: &[ty::GenericArg<'tcx>],
                 param: &ty::GenericParamDef,
                 arg: &GenericArg<'tcx>,
             ) -> ty::GenericArg<'tcx> {

Diff for: compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs

@@ -1261,7 +1261,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
             fn provided_kind(
                 &mut self,
-                _preceding_args: &[ty::GenericArg<'tcx>],
                 param: &ty::GenericParamDef,
                 arg: &GenericArg<'tcx>,
             ) -> ty::GenericArg<'tcx> {

Diff for: compiler/rustc_hir_typeck/src/method/confirm.rs

@@ -413,7 +413,6 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
 
             fn provided_kind(
                 &mut self,
-                _preceding_args: &[ty::GenericArg<'tcx>],
                 param: &ty::GenericParamDef,
                 arg: &GenericArg<'tcx>,
             ) -> ty::GenericArg<'tcx> {