Remove unused code (#44)

* remove unused #[macro_use] and #[allow(unused_macros)]

* remove unused FnBox trait

* remove unused temporary variable

* remove Evented trait requirement to implement Debug

src/reactor/mod.rs

@@ -360,16 +360,6 @@ impl Notify for MySetReadiness {
     }
 }
 
-trait FnBox: Send + 'static {
-    fn call_box(self: Box<Self>, lp: &Core);
-}
-
-impl<F: FnOnce(&Core) + Send + 'static> FnBox for F {
-    fn call_box(self: Box<Self>, lp: &Core) {
-        (*self)(lp)
-    }
-}
-
 fn read_ready() -> mio::Ready {
     mio::Ready::readable() | platform::hup()
 }

src/reactor/poll_evented.rs

@@ -69,7 +69,7 @@ pub struct PollEvented<E> {
     io: E,
 }
 
-impl<E: Evented + fmt::Debug> fmt::Debug for PollEvented<E> {
+impl<E: fmt::Debug> fmt::Debug for PollEvented<E> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_struct("PollEvented")
          .field("io", &self.io)
@@ -111,8 +111,7 @@ impl<E: Evented> PollEvented<E> {
             None => return Ok(()),
         };
 
-        let ret = inner.deregister_source(&self.io);
-        return ret
+        inner.deregister_source(&self.io)
     }
 }