Remove rustc_cached_queries.

Author: cjgillot

compiler/rustc_macros/src/query.rs

@@ -421,7 +421,6 @@ pub fn rustc_queries(input: TokenStream) -> TokenStream {
     let mut query_stream = quote! {};
     let mut query_description_stream = quote! {};
     let mut dep_node_def_stream = quote! {};
-    let mut cached_queries = quote! {};
 
     for group in groups.0 {
         for mut query in group.queries.0 {
@@ -434,12 +433,6 @@ pub fn rustc_queries(input: TokenStream) -> TokenStream {
                 _ => quote! { #result_full },
             };
 
-            if modifiers.cache.is_some() {
-                cached_queries.extend(quote! {
-                    #name,
-                });
-            }
-
             let mut attributes = Vec::new();
 
             // Pass on the fatal_cycle modifier
@@ -508,11 +501,6 @@ pub fn rustc_queries(input: TokenStream) -> TokenStream {
                 );
             }
         }
-        macro_rules! rustc_cached_queries {
-            ($($macro:tt)*) => {
-                $($macro)*(#cached_queries);
-            }
-        }
 
         #query_description_stream
     })