Fix clippy errors

trace-normalization/src/normalize_utils.rs

@@ -26,7 +26,7 @@ pub fn normalize_service(svc: &mut String) {
     truncate_utf8(svc, MAX_SERVICE_LEN);
     normalize_tag(svc);
     if svc.is_empty() {
-        *svc = DEFAULT_SERVICE_NAME.to_owned();
+        DEFAULT_SERVICE_NAME.clone_into(svc);
     }
 }
 
@@ -35,13 +35,14 @@ pub fn normalize_name(name: &mut String) {
     truncate_utf8(name, MAX_NAME_LEN);
     normalize_metric_name(name);
     if name.is_empty() {
-        *name = DEFAULT_SPAN_NAME.to_owned();
+        DEFAULT_SPAN_NAME.clone_into(name);
     }
 }
 
+#[allow(clippy::ptr_arg)]
 pub fn normalize_resource(resource: &mut String, name: &str) {
     if resource.is_empty() {
-        *resource = name.to_owned();
+        name.clone_into(resource);
     }
 }
 
@@ -55,7 +56,7 @@ pub fn normalize_span_start_duration(start: &mut i64, duration: &mut i64) {
     if *duration < 0 {
         *duration = 0;
     }
-    if *duration > std::i64::MAX - *start {
+    if *duration > i64::MAX - *start {
         *duration = 0;
     }
 

trace-utils/src/trace_utils.rs

@@ -1,13 +1,8 @@
 // Copyright 2023-Present Datadog, Inc. https://www.datadoghq.com/
 // SPDX-License-Identifier: Apache-2.0
 
-use anyhow::Context;
-use futures::stream::FuturesUnordered;
-use futures::StreamExt;
-use hyper::http::HeaderValue;
-use hyper::{body::Buf, Body, Client, HeaderMap, Method, Response, StatusCode};
-use log::{error, info};
-use serde::{Deserialize, Serialize};
+use hyper::{body::Buf, Body};
+use log::error;
 use std::cmp::Ordering;
 use std::collections::{HashMap, HashSet};
 
@@ -144,7 +139,7 @@ pub fn get_root_span_index(trace: &[pb::Span]) -> anyhow::Result<usize> {
 
     // Do a first pass to find if we have an obvious root span (starting from the end) since some
     // clients put the root span last.
-    for (i, span) in trace.into_iter().enumerate().rev() {
+    for (i, span) in trace.iter().enumerate().rev() {
         if span.parent_id == 0 {
             return Ok(i);
         }