Fixing the clippy warnings

src/std.rs

@@ -43,7 +43,7 @@ impl Eq for Instant {}
 
 impl PartialOrd for Instant {
     fn partial_cmp(&self, other: &Instant) -> Option<Ordering> {
-        self.inner.partial_cmp(&other.inner)
+        Some(self.cmp(other))
     }
 }
 
@@ -146,7 +146,7 @@ impl Eq for SystemTime {}
 
 impl PartialOrd for SystemTime {
     fn partial_cmp(&self, other: &SystemTime) -> Option<Ordering> {
-        self.inner.partial_cmp(&other.inner)
+        Some(self.cmp(other))
     }
 }
 

src/timer/clock.rs

@@ -21,8 +21,7 @@ pub(crate) fn clock() -> Clock {
     unsafe {
         let clock = Clock::from_raw(clock);
         let ret = clock.clone();
-        #[allow(clippy::drop_copy)]
-        drop(clock.into_raw());
+        let _ = clock.into_raw();
         ret
     }
 }

src/timer/heap.rs

@@ -66,7 +66,7 @@ impl<T: Ord> Heap<T> {
 
     pub fn peek(&self) -> Option<&T> {
         self.assert_consistent();
-        self.items.get(0).map(|i| &i.0)
+        self.items.first().map(|i| &i.0)
     }
 
     pub fn pop(&mut self) -> Option<T> {
@@ -161,10 +161,6 @@ impl<T: Ord> Heap<T> {
     }
 
     fn assert_consistent(&self) {
-        if !cfg!(assert_timer_heap_consistent) {
-            return;
-        }
-
         assert_eq!(
             self.items.len(),
             self.index

src/timer/mod.rs

@@ -554,8 +554,7 @@ impl Default for TimerHandle {
         unsafe {
             let handle = TimerHandle::from_raw(fallback);
             let ret = handle.clone();
-            #[allow(clippy::drop_copy)]
-            drop(handle.into_raw());
+            let _ = handle.into_raw();
             ret
         }
     }

src/tokio_util/wheel/level.rs

@@ -233,7 +233,7 @@ fn slot_for(duration: u64, level: usize) -> usize {
     ((duration >> (level * 6)) % LEVEL_MULT as u64) as usize
 }
 
-#[cfg(all(test, not(loom)))]
+#[cfg(test)]
 mod test {
     use super::*;
 

src/tokio_util/wheel/mod.rs

@@ -7,7 +7,6 @@ pub(crate) use self::stack::Stack;
 
 use std::borrow::Borrow;
 use std::fmt::Debug;
-use std::usize;
 
 #[derive(Debug)]
 pub(crate) struct Wheel<T> {
@@ -201,7 +200,7 @@ fn level_for(elapsed: u64, when: u64) -> usize {
     significant / 6
 }
 
-#[cfg(all(test, not(loom)))]
+#[cfg(test)]
 mod test {
     use super::*;