remove async_trait used in generic_server.rs

src/api/k2v/Cargo.toml

@@ -19,7 +19,6 @@ garage_table.workspace = true
 garage_util = { workspace = true, features = [ "k2v" ] }
 garage_api_common.workspace = true
 
-async-trait.workspace = true
 base64.workspace = true
 err-derive.workspace = true
 tracing.workspace = true

src/api/k2v/api_server.rs

@@ -1,7 +1,5 @@
 use std::sync::Arc;
 
-use async_trait::async_trait;
-
 use hyper::{body::Incoming as IncomingBody, Method, Request, Response};
 use tokio::sync::watch;
 
@@ -48,7 +46,6 @@ impl K2VApiServer {
 	}
 }
 
-#[async_trait]
 impl ApiHandler for K2VApiServer {
 	const API_NAME: &'static str = "k2v";
 	const API_NAME_DISPLAY: &'static str = "K2V";