chore(repo): prune dead code and duplicate abstractions (#3413)

fluxer_admin/src/main.rs

@@ -22,33 +22,9 @@ async fn main() -> anyhow::Result<()> {
     tracing::info!(%addr, "starting Fluxer admin service");
 
     axum::serve(listener, router)
-        .with_graceful_shutdown(shutdown_signal())
+        .with_graceful_shutdown(fluxer_common::shutdown::wait_for_shutdown())
         .await
         .context("admin server exited unexpectedly")?;
 
     Ok(())
 }
-
-async fn shutdown_signal() {
-    let ctrl_c = async {
-        tokio::signal::ctrl_c()
-            .await
-            .expect("failed to install Ctrl+C handler");
-    };
-
-    #[cfg(unix)]
-    let terminate = async {
-        tokio::signal::unix::signal(tokio::signal::unix::SignalKind::terminate())
-            .expect("failed to install SIGTERM handler")
-            .recv()
-            .await;
-    };
-
-    #[cfg(not(unix))]
-    let terminate = std::future::pending::<()>();
-
-    tokio::select! {
-        _ = ctrl_c => {},
-        _ = terminate => {},
-    }
-}