Fix clippy::let_and_return

(cherry picked from commit 3fe51e5)

Author: cuviper

rayon-core/src/sleep/mod.rs

@@ -166,11 +166,9 @@ impl Sleep {
 
     #[cold]
     fn announce_sleepy(&self) -> JobsEventCounter {
-        let counters = self
-            .counters
-            .increment_jobs_event_counter_if(JobsEventCounter::is_active);
-        let jobs_counter = counters.jobs_counter();
-        jobs_counter
+        self.counters
+            .increment_jobs_event_counter_if(JobsEventCounter::is_active)
+            .jobs_counter()
     }
 
     #[cold]