fix: remove noop trace_thread

Author: aminya

src/backtrace/mod.rs

@@ -177,8 +177,6 @@ cfg_if::cfg_if! {
     } else {
         mod noop;
         use self::noop::trace as trace_imp;
-        use self::noop::trace_thread as trace_thread_imp;
-        use self::noop::trace_thread_unsynchronized;
         pub(crate) use self::noop::Frame as FrameImp;
     }
 }

src/backtrace/noop.rs

@@ -6,11 +6,6 @@ use core::ffi::c_void;
 #[inline(always)]
 pub fn trace(_cb: &mut dyn FnMut(&super::Frame) -> bool) {}
 
-#[inline(always)]
-pub fn trace_thread(cb: &mut dyn FnMut(&super::Frame) -> bool, thread: *mut c_void) {}
-
-pub fn trace_thread_unsynchronized<F: FnMut(&Frame) -> bool>(thread: *mut c_void, mut cb: F) {}
-
 #[derive(Clone)]
 pub struct Frame;