[rust-interop] Add support for calling base class constructors.

PiperOrigin-RevId: 424888196
diff --git a/lifetime_annotations/type_lifetimes.h b/lifetime_annotations/type_lifetimes.h
index 621a6be..a48b14f 100644
--- a/lifetime_annotations/type_lifetimes.h
+++ b/lifetime_annotations/type_lifetimes.h
@@ -48,8 +48,6 @@
     });
 
 // Extracts the lifetime parameters of the given record type.
-// TODO(veluca): for now, lifetime parameters are extracted from an attribute on
-// the LIFETIMES() method on the record type. This is a temporary hack.
 llvm::SmallVector<std::string> GetLifetimeParameters(
     const clang::CXXRecordDecl* cxx_record);