lint: allow dead code in prost generated pb codes

To suppress Clippy’s "struct is never constructed" warning since 1.89.0

Author: belltoy

src/rpc/pb.rs

@@ -3,6 +3,7 @@
 #![allow(clippy::enum_variant_names)]
 #![allow(clippy::derive_partial_eq_without_eq)]
 #![allow(clippy::doc_lazy_continuation)]
+#![allow(dead_code)]
 
 pub mod authpb {
     tonic::include_proto!("authpb");