Rollup merge of #141632 - fee1-dead-contrib:push-txmttkxvwqxl, r=oli-obk

remove `visit_mt` from `ast::mut_visit`
doesn't look like anyone is using it.

Author: matthiaskrgr

compiler/rustc_ast/src/mut_visit.rs

@@ -300,10 +300,6 @@ pub trait MutVisitor: Sized {
 walk_precise_capturing_arg(self, arg);
 }
 
-fnvisit_mt(&mutself,mt:&mutMutTy){
-walk_mt(self, mt);
-}
-
 fnvisit_expr_field(&mutself,f:&mutExprField){
 walk_expr_field(self, f);
 }
@@ -519,10 +515,10 @@ pub fn walk_ty<T: MutVisitor>(vis: &mut T, ty: &mut P<Ty>) {
 TyKind::Infer | TyKind::ImplicitSelf | TyKind::Dummy | TyKind::Never | TyKind::CVarArgs => {
 }
 TyKind::Slice(ty) => vis.visit_ty(ty),
-TyKind::Ptr(mt) => vis.visit_mt(mt),
-TyKind::Ref(lt,mt) | TyKind::PinnedRef(lt,mt) => {
+TyKind::Ptr(MutTy{ ty,mutbl: _ }) => vis.visit_ty(ty),
+TyKind::Ref(lt,MutTy{ ty,mutbl: _ }) | TyKind::PinnedRef(lt,MutTy{ ty,mutbl: _ }) => {
 visit_opt(lt, |lt| vis.visit_lifetime(lt));
- vis.visit_mt(mt);
+ vis.visit_ty(ty);
 }
 TyKind::BareFn(bft) => {
 letBareFnTy{ safety,ext: _, generic_params, decl, decl_span } = bft.deref_mut();
@@ -1003,10 +999,6 @@ pub fn walk_flat_map_expr_field<T: MutVisitor>(
 smallvec![f]
 }
 
-fnwalk_mt<T:MutVisitor>(vis:&mutT,MutTy{ ty,mutbl: _ }:&mutMutTy){
- vis.visit_ty(ty);
-}
-
 pubfnwalk_block<T:MutVisitor>(vis:&mutT,block:&mutP<Block>){
 letBlock{ id, stmts,rules: _, span,tokens: _ } = block.deref_mut();
  vis.visit_id(id);