fix(tests): duplicate hint mod defs with loom

Signed-off-by: Eliza Weisman <[email protected]>

src/sync.rs

@@ -10,10 +10,6 @@ mod inner {
         cell::UnsafeCell, hint, lazy_static, sync::Mutex, thread::yield_now, thread_local,
     };
 
-    pub(crate) mod hint {
-        pub(crate) use super::hint::spin_loop_hint as spin_loop;
-    }
-
     pub(crate) mod alloc {
         #![allow(dead_code)]
         use loom::alloc;
@@ -76,7 +72,8 @@ mod inner {
 
     pub(crate) mod hint {
         #[inline(always)]
-        pub(crate) fn spin_loop() { // MSRV: std::hint::spin_loop() stabilized in 1.49.0
+        pub(crate) fn spin_loop() {
+            // MSRV: std::hint::spin_loop() stabilized in 1.49.0
             #[allow(deprecated)]
             super::atomic::spin_loop_hint()
         }