remove def_id_to_node_id in ast lowering

compiler/rustc_middle/src/ty/mod.rs

@@ -215,7 +215,6 @@ pub struct ResolverAstLowering {
     pub next_node_id: ast::NodeId,
 
     pub node_id_to_def_id: NodeMap<LocalDefId>,
-    pub def_id_to_node_id: IndexVec<LocalDefId, ast::NodeId>,
 
     pub trait_map: NodeMap<Vec<hir::TraitCandidate>>,
     /// List functions and methods for which lifetime elision was successful.

compiler/rustc_resolve/src/lib.rs

@@ -1618,7 +1618,6 @@ pub fn into_outputs(self) -> ResolverOutputs {
                 .into_items()
                 .map(|(k, f)| (k, f.key()))
                 .collect(),
-            def_id_to_node_id: self.def_id_to_node_id,
             trait_map: self.trait_map,
             lifetime_elision_allowed: self.lifetime_elision_allowed,
             lint_buffer: Steal::new(self.lint_buffer),