Fix OSS build.

Fix up warnings that have been hanging around.

PiperOrigin-RevId: 901367232

Author: thunderseethe

cc_bindings_from_rs/generate_bindings/database/code_snippet.rs

@@ -14,7 +14,7 @@ use error_report::bail;
 use itertools::Itertools;
 use proc_macro2::TokenStream;
 use rustc_middle::ty::Ty;
-use rustc_span::def_id::{DefId, LOCAL_CRATE};
+use rustc_span::def_id::DefId;
 use rustc_span::Symbol;
 use std::cmp::Ordering;
 use std::collections::BTreeSet;

cc_bindings_from_rs/generate_bindings/lib.rs

@@ -2,7 +2,6 @@
 // Exceptions. See /LICENSE for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #![feature(rustc_private)]
-#![feature(cfg_accessible)]
 #![feature(stmt_expr_attributes)]
 #![feature(proc_macro_hygiene)]
 
@@ -1553,12 +1552,6 @@ fn generate_doc_comment(db: &BindingsGenerator, def_id: DefId) -> TokenStream {
     }
 }
 
-/// Returns the name of the item identified by `def_id`, or "<unknown>" if
-/// the item can't be identified.
-fn item_name(db: &BindingsGenerator<'_>, def_id: DefId) -> Symbol {
-    db.tcx().opt_item_name(def_id).unwrap_or_else(|| Symbol::intern("<unknown>"))
-}
-
 fn item_name_for_error_report(db: &BindingsGenerator<'_>, def_id: DefId) -> error_report::ItemName {
     let crate_name = db.tcx().crate_name(def_id.krate);
     let name = format!("{crate_name}::{}", db.tcx().def_path_str(def_id)).into();

cc_bindings_from_rs/generate_bindings/query_compiler.rs

@@ -194,7 +194,7 @@ pub fn has_non_lifetime_generics<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> bool
 }
 
 pub fn post_analysis_typing_env(tcx: TyCtxt, def_id: DefId) -> ty::TypingEnv {
-    ty::TypingEnv { typing_mode: ty::TypingMode::PostAnalysis, param_env: tcx.param_env(def_id) }
+    ty::TypingEnv::post_analysis(tcx, def_id)
 }
 
 /// Returns whether `ty` is copyable inside the given environment (e.g. fn or type def).

cc_bindings_from_rs/lib.rs

@@ -2,7 +2,6 @@
 // Exceptions. See /LICENSE for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-#![feature(never_type)]
 #![feature(rustc_private)]
 
 extern crate rustc_driver;