Fix warnings

src/frame/head.rs

@@ -1,5 +1,3 @@
-use super::Error;
-
 use bytes::{BufMut, BigEndian};
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]

src/frame/headers.rs

@@ -1,6 +1,5 @@
 use super::StreamId;
 use hpack;
-use error::Reason;
 use frame::{self, Frame, Head, Kind, Error};
 use util::byte_str::ByteStr;
 
@@ -201,6 +200,10 @@ impl Headers {
         response
     }
 
+    pub fn into_request(self) -> request::Head {
+        unimplemented!();
+    }
+
     pub fn encode(self, encoder: &mut hpack::Encoder, dst: &mut BytesMut)
         -> Option<Continuation>
     {

src/frame/mod.rs

@@ -1,10 +1,6 @@
 use hpack;
 use error::{ConnectionError, Reason};
 
-use bytes::{Bytes, BytesMut, BufMut};
-
-use std::io;
-
 /// A helper macro that unpacks a sequence of 4 bytes found in the buffer with
 /// the given identifier, starting at the given offset, into the given integer
 /// type. Obviously, the integer type should be able to support at least 4
@@ -113,8 +109,6 @@ impl Frame {
 
 impl From<Error> for ConnectionError {
     fn from(src: Error) -> ConnectionError {
-        use self::Error::*;
-
         match src {
             // TODO: implement
             _ => ConnectionError::Proto(Reason::ProtocolError),

src/frame/reset.rs

@@ -1,5 +1,5 @@
 use frame::{Head, Error};
-use super::{head, StreamId};
+use super::{StreamId};
 
 #[derive(Debug)]
 pub struct Reset {

src/frame/settings.rs

@@ -1,5 +1,5 @@
 use frame::{Frame, Error, Head, Kind};
-use bytes::{Bytes, BytesMut, BufMut, BigEndian};
+use bytes::{BytesMut, BufMut, BigEndian};
 
 #[derive(Debug, Clone, Default, Eq, PartialEq)]
 pub struct Settings {