remove unused identity macro

this is not required anymore by the sortable macro

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

src/api2/tape/drive.rs

@@ -6,7 +6,7 @@ use std::collections::HashMap;
 use anyhow::{bail, format_err, Error};
 use serde_json::Value;
 
-use proxmox_sys::{sortable, identity};
+use proxmox_sys::sortable;
 use proxmox_router::{
     list_subdirs_api_method, Permission, Router, RpcEnvironment, RpcEnvironmentType, SubdirMap,
 };