Remove redundant imports

These became warnings in a recent nightly.

The TryFrom/TryInto imports were missed in
4089891f6c, but the rest are truly
redundant.

tokio-xmpp/examples/download_avatars.rs

@@ -4,7 +4,6 @@ use std::fs::{create_dir_all, File};
 use std::io::{self, Write};
 use std::process::exit;
 use std::str::FromStr;
-use tokio;
 use tokio_xmpp::AsyncClient as Client;
 use xmpp_parsers::{
     avatar::{Data as AvatarData, Metadata as AvatarMetadata},

tokio-xmpp/examples/echo_bot.rs

@@ -2,7 +2,6 @@ use futures::stream::StreamExt;
 use std::env::args;
 use std::process::exit;
 use std::str::FromStr;
-use tokio;
 use tokio_xmpp::AsyncClient as Client;
 use xmpp_parsers::message::{Body, Message, MessageType};
 use xmpp_parsers::presence::{Presence, Show as PresenceShow, Type as PresenceType};

tokio-xmpp/examples/send_message.rs

@@ -2,7 +2,6 @@ use std::env::args;
 use std::io::{stdin, Read};
 use std::process::exit;
 use std::str::FromStr;
-use tokio;
 use tokio_xmpp::SimpleClient as Client;
 use xmpp_parsers::message::{Body, Message};
 use xmpp_parsers::Jid;

tokio-xmpp/src/client/bind.rs

@@ -1,5 +1,4 @@
 use futures::stream::StreamExt;
-use std::marker::Unpin;
 use tokio::io::{AsyncRead, AsyncWrite};
 use xmpp_parsers::bind::{BindQuery, BindResponse};
 use xmpp_parsers::iq::{Iq, IqType};

tokio-xmpp/src/component/auth.rs

@@ -1,5 +1,4 @@
 use futures::stream::StreamExt;
-use std::marker::Unpin;
 use tokio::io::{AsyncRead, AsyncWrite};
 use xmpp_parsers::{component::Handshake, ns};
 

tokio-xmpp/src/starttls/happy_eyeballs.rs

@@ -1,6 +1,5 @@
 use super::error::{ConnectorError, Error};
 use hickory_resolver::{IntoName, TokioAsyncResolver};
-use idna;
 use log::debug;
 use std::net::SocketAddr;
 use tokio::net::TcpStream;

tokio-xmpp/src/starttls/mod.rs

@@ -10,7 +10,6 @@ use {
         rustls::{ClientConfig, OwnedTrustAnchor, RootCertStore, ServerName},
         TlsConnector,
     },
-    webpki_roots,
 };
 
 #[cfg(feature = "tls-native")]

tokio-xmpp/src/stream_start.rs

@@ -1,5 +1,4 @@
 use futures::{sink::SinkExt, stream::StreamExt};
-use std::marker::Unpin;
 use tokio::io::{AsyncRead, AsyncWrite};
 use tokio_util::codec::Framed;
 use xmpp_parsers::{ns, Element, Jid};

tokio-xmpp/src/xmpp_codec.rs

@@ -5,9 +5,7 @@ use bytes::{BufMut, BytesMut};
 use log::debug;
 use minidom::tree_builder::TreeBuilder;
 use rxml::{Lexer, PushDriver, RawParser};
-use std;
 use std::collections::HashMap;
-use std::default::Default;
 use std::fmt::Write;
 use std::io;
 #[cfg(feature = "syntax-highlighting")]
@@ -252,7 +250,6 @@ impl<'a> std::io::Write for WriteBytes<'a> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use bytes::BytesMut;
 
     #[test]
     fn test_stream_start() {