Remove traversable impl for usize

Author: eggyal

compiler/rustc_mir_transform/src/function_item_references.rs

@@ -171,7 +171,7 @@ impl<'tcx> FunctionItemRefChecker<'_, 'tcx> {
         let ty_params = fn_args.types().map(|ty| format!("{ty}"));
         let const_params = fn_args.consts().map(|c| format!("{c}"));
         let params = ty_params.chain(const_params).join(", ");
-        let num_args = fn_sig.inputs().map_bound(|inputs| inputs.len()).skip_binder();
+        let num_args = fn_sig.inputs().skip_binder().len();
         let variadic = if fn_sig.c_variadic() { ", ..." } else { "" };
         let ret = if fn_sig.output().skip_binder().is_unit() { "" } else { " -> _" };
         let sugg = format!(

compiler/rustc_type_ir/src/macros.rs

@@ -42,7 +42,6 @@ macro_rules! TrivialTypeTraversalImpls {
 
 TrivialTypeTraversalImpls! {
     (),
-    usize,
     crate::AliasRelationDirection,
     crate::UniverseIndex,
 }