Fix warnings.

PiperOrigin-RevId: 879877345

Author: thunderseethe

cc_bindings_from_rs/generate_bindings/format_type.rs

@@ -38,7 +38,7 @@ use std::rc::Rc;
 
 /// Implementation of `BindingsGenerator::format_top_level_ns_for_crate`.
 pub fn format_top_level_ns_for_crate(db: &BindingsGenerator<'_>, krate: CrateNum) -> Rc<[Symbol]> {
-    let mut crate_name = db.tcx().crate_name(krate);
+    let crate_name = db.tcx().crate_name(krate);
     let crate_needle_name =
         if krate == db.source_crate_num() { "self" } else { crate_name.as_str() };
     if let Some(namespaces) = db.crate_name_to_namespace().get(crate_needle_name) {

cc_bindings_from_rs/generate_bindings/lib.rs

@@ -589,7 +589,7 @@ fn symbol_canonical_name(db: &BindingsGenerator<'_>, def_id: DefId) -> Option<Fu
     // to include the `_rust_proto` suffix, but the rmeta file contains the unsuffixed crate name.
     // If we're naming a symbol from our source crate, use the source crate name as the krate name
     // to resolve any renaming issues.
-    let mut krate = (def_id.krate == db.source_crate_num())
+    let krate = (def_id.krate == db.source_crate_num())
         .then_some(())
         .and_then(|_| db.source_crate_name())
         .map(|source_crate_name| Symbol::intern(source_crate_name.as_ref()))