satisfied cargo clippy

WatcherAgent/src/api.rs

@@ -5,7 +5,7 @@ use crate::models::{HeartbeatDto, IdResponse, MetricDto, RegistrationDto};
 use anyhow::Result;
 use reqwest::{Client, StatusCode};
 use std::error::Error;
-use tokio::time::{interval, sleep};
+use tokio::time::sleep;
 
 pub async fn register_with_server(
     base_url: &str,