Remove allow(dead_code) annotations.
Remove allow(dead_code) annotations.

tempbottle/capnproto-rust,tempbottle/capnpc-rust,maurer/capnpc-rust,tempbottle/capnpc-rust,dwrensha/capnproto-rust,placrosse/capnproto-rust,maurer/capnpc-rust,dwrensha/capnpc-rust