make hir::Ty/ConstArg methods generic where applicable

Author: BoxyUwU

clippy_lints/src/extra_unused_type_parameters.rs

@@ -197,7 +197,7 @@ impl<'tcx> Visitor<'tcx> for TypeWalker<'_, 'tcx> {
     type NestedFilter = nested_filter::OnlyBodies;
 
     fn visit_ty(&mut self, t: &'tcx Ty<'tcx, AmbigArg>) {
-        if let Some((def_id, _)) = t.as_unambig_ty().peel_refs().as_generic_param() {
+        if let Some((def_id, _)) = t.peel_refs().as_generic_param() {
             self.ty_params.remove(&def_id);
         } else {
             walk_ty(self, t);

clippy_lints/src/from_over_into.rs

@@ -92,7 +92,7 @@ impl<'tcx> LateLintPass<'tcx> for FromOverInto {
                 |diag| {
                     // If the target type is likely foreign mention the orphan rules as it's a common source of
                     // confusion
-                    if path_def_id(cx, target_ty.as_unambig_ty().peel_refs()).is_none_or(|id| !id.is_local()) {
+                    if path_def_id(cx, target_ty.peel_refs()).is_none_or(|id| !id.is_local()) {
                         diag.help(
                             "`impl From<Local> for Foreign` is allowed by the orphan rules, for more information see\n\
                             https://doc.rust-lang.org/reference/items/implementations.html#trait-implementation-coherence"