clippy warnings

actix-service/src/and_then_apply.rs

@@ -108,7 +108,7 @@ where
 
     fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
         if let Some(ref mut fut) = self.fut_t {
-            return fut.poll().map_err(|e| e.into());
+            return fut.poll();
         }
 
         match self.fut_a.as_mut().expect("Bug in actix-service").poll() {

actix-service/src/and_then_apply_fn.rs

@@ -72,7 +72,7 @@ where
 
     fn poll_ready(&mut self) -> Poll<(), Self::Error> {
         try_ready!(self.a.poll_ready());
-        self.b.get_mut().poll_ready().map_err(|e| e.into())
+        self.b.get_mut().poll_ready()
     }
 
     fn call(&mut self, req: A::Request) -> Self::Future {
@@ -123,7 +123,7 @@ where
                 self.poll()
             }
             Ok(Async::NotReady) => Ok(Async::NotReady),
-            Err(err) => Err(err.into()),
+            Err(err) => Err(err),
         }
     }
 }

actix-service/src/apply.rs

@@ -78,7 +78,7 @@ where
 
     fn poll_ready(&mut self) -> Poll<(), Self::Error> {
         try_ready!(self.service.poll_ready());
-        self.transform.poll_ready().map_err(|e| e.into())
+        self.transform.poll_ready()
     }
 
     fn call(&mut self, req: Self::Request) -> Self::Future {

actix-service/src/blank.rs

@@ -18,6 +18,7 @@ impl<R, E> Blank<R, E> {
 }
 
 impl<R> Blank<R, ()> {
+    #[allow(clippy::new_ret_no_self)]
     pub fn new<E>() -> Blank<R, E> {
         Blank { _t: PhantomData }
     }