Remove unused item_generics_num_lifetimes.

Author: cjgillot

compiler/rustc_middle/src/ty/mod.rs

@@ -160,7 +160,6 @@ pub struct ResolverOutputs {
     /// exist under `std`. For example, wrote `str::from_utf8` instead of `std::str::from_utf8`.
     pub confused_type_with_std_module: FxHashMap<Span, Span>,
     pub registered_tools: RegisteredTools,
-    pub item_generics_num_lifetimes: FxHashMap<LocalDefId, usize>,
 
     pub legacy_const_generic_args: FxHashMap<DefId, Option<Vec<usize>>>,
 

compiler/rustc_resolve/src/lib.rs

@@ -1429,7 +1429,6 @@ impl<'a> Resolver<'a> {
             proc_macros,
             confused_type_with_std_module,
             registered_tools: self.registered_tools,
-            item_generics_num_lifetimes: self.item_generics_num_lifetimes,
             legacy_const_generic_args: self.legacy_const_generic_args,
             partial_res_map: self.partial_res_map,
             import_res_map: self.import_res_map,
@@ -1470,7 +1469,6 @@ impl<'a> Resolver<'a> {
             confused_type_with_std_module: self.confused_type_with_std_module.clone(),
             registered_tools: self.registered_tools.clone(),
             access_levels: self.access_levels.clone(),
-            item_generics_num_lifetimes: self.item_generics_num_lifetimes.clone(),
             legacy_const_generic_args: self.legacy_const_generic_args.clone(),
             partial_res_map: self.partial_res_map.clone(),
             import_res_map: self.import_res_map.clone(),