refactor(core): remove hotpath profiling (#2394)

hotpath adds noticeable overhead on hot paths, so remove the optional
profiling integration while keeping direct quanta::Instant timing.

easytier/src/common/acl_processor.rs

@@ -6,7 +6,7 @@ use std::{
     time::{Duration, SystemTime, UNIX_EPOCH},
 };
 
-use hotpath::instant::Instant;
+use quanta::Instant;
 
 use crate::common::{config::ConfigLoader, global_ctx::ArcGlobalCtx, token_bucket::TokenBucket};
 use crate::proto::acl::*;

easytier/src/common/stats_manager.rs

@@ -1,5 +1,5 @@
 use dashmap::DashMap;
-use hotpath::instant::Instant;
+use quanta::Instant;
 use serde::{Deserialize, Serialize};
 use std::cell::UnsafeCell;
 use std::fmt;

easytier/src/common/stun.rs

@@ -8,7 +8,7 @@ use crate::proto::common::{NatType, StunInfo};
 use anyhow::Context;
 use chrono::Local;
 use crossbeam::atomic::AtomicCell;
-use hotpath::instant::Instant;
+use quanta::Instant;
 use rand::seq::IteratorRandom;
 use socket2::{SockAddr, SockRef};
 use tokio::io::{AsyncReadExt, AsyncWriteExt};