ci: clippy suggestion

tools/utils/src/push_to_uplink.rs

@@ -17,7 +17,7 @@ async fn main() {
 
 fn argv_to_payload(pairs: &[String]) -> Value {
     // nlici
-    let stream = pairs.get(0).unwrap();
+    let stream = pairs.first().unwrap();
     let timestamp = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_millis() as u64;
     let kv_count = pairs.len() - 1;
     assert_eq!(kv_count % 2, 0);

uplink/src/base/serializer/mod.rs

@@ -794,7 +794,7 @@ fn check_and_flush_metrics(
     metrics.set_disk_utilized(disk_utilized);
 
     // Send pending metrics. This signifies state change
-    while let Some(metrics) = pending.get(0) {
+    while let Some(metrics) = pending.front() {
         match metrics {
             SerializerMetrics::Main(metrics) => {
                 // Always send pending metrics. They represent state changes

uplink/src/collector/systemstats.rs

@@ -613,7 +613,7 @@ impl StatCollector {
         self.sys.refresh_processes();
         let timestamp = clock() as u64;
         for (&id, p) in self.sys.processes() {
-            let name = p.cmd().get(0).map(|s| s.to_string()).unwrap_or(p.name().to_string());
+            let name = p.cmd().first().map(|s| s.to_string()).unwrap_or(p.name().to_string());
 
             if self.config.system_stats.process_names.contains(&name) {
                 let payload = self.processes.push(id.as_u32(), p, name, timestamp);