diff --git a/src/api_client.rs b/src/api_client.rs
index 5170749..74e0397 100644
--- a/src/api_client.rs
+++ b/src/api_client.rs
@@ -2,7 +2,6 @@ use crate::config::{AgentConfig, HeartbeatMetadata};
 use crate::metrics::Metric;
 use crate::proto::agent;
 use prost::Message;
-use serde_json::json;
 use std::time::Duration;
 use thiserror::Error;
 
diff --git a/src/metrics/mod.rs b/src/metrics/mod.rs
index 8db631f..f19d391 100644
--- a/src/metrics/mod.rs
+++ b/src/metrics/mod.rs
@@ -21,7 +21,7 @@ impl Timestamp {
         Self::now().secs - self.secs
     }
 
-    pub fn to_unix_timestamp(&self) -> i64 {
+    pub fn to_unix_timestamp(self) -> i64 {
         self.secs
     }