remove non-tracinghprof implementation

Author: davidbarsky

crates/profile/src/hprof.rs

@@ -6,13 +6,10 @@ mod stop_watch;
 mod memory_usage;
 #[cfg(feature = "cpu_profiler")]
 mod google_cpu_profiler;
-mod hprof;
-mod tree;
 
 use std::cell::RefCell;
 
 pub use crate::{
-    hprof::{heartbeat, heartbeat_span, init, init_from, span},
     memory_usage::{Bytes, MemoryUsage},
     stop_watch::{StopWatch, StopWatchSpan},
 };