Fix unused borrow warning

Author: taiki-e

tests/basic.rs

@@ -64,7 +64,7 @@ macro_rules! schedule {
 
             let guard = Guard(Box::new(0));
             move |_runnable| {
-                &guard;
+                let _ = &guard;
                 $sched.fetch_add(1, Ordering::SeqCst);
             }
         };

tests/cancel.rs

@@ -81,7 +81,7 @@ macro_rules! schedule {
 
             let guard = Guard(Box::new(0));
             move |runnable: Runnable| {
-                &guard;
+                let _ = &guard;
                 runnable.schedule();
                 $sched.fetch_add(1, Ordering::SeqCst);
             }

tests/join.rs

@@ -82,7 +82,7 @@ macro_rules! schedule {
 
             let guard = Guard(Box::new(0));
             move |runnable: Runnable| {
-                &guard;
+                let _ = &guard;
                 runnable.schedule();
                 $sched.fetch_add(1, Ordering::SeqCst);
             }

tests/panic.rs

@@ -69,7 +69,7 @@ macro_rules! schedule {
 
             let guard = Guard(Box::new(0));
             move |_runnable: Runnable| {
-                &guard;
+                let _ = &guard;
                 $sched.fetch_add(1, Ordering::SeqCst);
             }
         };

tests/ready.rs

@@ -81,7 +81,7 @@ macro_rules! schedule {
 
             let guard = Guard(Box::new(0));
             move |_runnable: Runnable| {
-                &guard;
+                let _ = &guard;
                 $sched.fetch_add(1, Ordering::SeqCst);
             }
         };

tests/waker_panic.rs

@@ -86,7 +86,7 @@ macro_rules! schedule {
 
             let guard = Guard(Box::new(0));
             let sched = move |runnable: Runnable| {
-                &guard;
+                let _ = &guard;
                 $sched.fetch_add(1, Ordering::SeqCst);
                 s.send(runnable).unwrap();
             };

tests/waker_pending.rs

@@ -77,7 +77,7 @@ macro_rules! schedule {
 
             let guard = Guard(Box::new(0));
             let sched = move |runnable: Runnable| {
-                &guard;
+                let _ = &guard;
                 $sched.fetch_add(1, Ordering::SeqCst);
                 s.send(runnable).unwrap();
             };

tests/waker_ready.rs

@@ -83,7 +83,7 @@ macro_rules! schedule {
 
             let guard = Guard(Box::new(0));
             let sched = move |runnable: Runnable| {
-                &guard;
+                let _ = &guard;
                 $sched.fetch_add(1, Ordering::SeqCst);
                 s.send(runnable).unwrap();
             };