clippy: fix dead-code warning

We get a dead code warning when running clippy on the attestation agent
with the bin and ttrpc features. Maybe this is because we are not
building binary main code. Interestingly, this doesn't happen with Rust
1.82.0, so rather than go down the rabbit hole, allow dead code in two
  places for now.

Signed-off-by: Tobin Feldman-Fitzthum <[email protected]>

attestation-agent/attestation-agent/src/bin/ttrpc_dep/server.rs

@@ -17,8 +17,10 @@ use crate::ttrpc_dep::ttrpc_protocol::{
     attestation_agent_ttrpc::AttestationAgentService,
 };
 
+#[allow(dead_code)]
 pub const AGENT_NAME: &str = "attestation-agent";
 
+#[allow(dead_code)]
 pub struct AA {
     pub(crate) inner: AttestationAgent,
 }