drop pbs_tools::auth

`pbs_client::connect_to_localhost` now requires the key as
optional parameter

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

src/bin/proxmox-backup-api.rs

@@ -9,7 +9,6 @@ use proxmox::try_block;
 use proxmox::api::RpcEnvironmentType;
 use proxmox::tools::fs::CreateOptions;
 
-use pbs_tools::auth::private_auth_key;
 use proxmox_rest_server::{daemon, ApiConfig, RestServer};
 
 use proxmox_backup::server::auth::default_api_auth;