Fixing some extra imports

src/client.rs

@@ -1,6 +1,6 @@
 use std::net::{TcpStream, ToSocketAddrs};
 use openssl::ssl::{SslContext, SslStream};
-use std::io::{ErrorKind, Read, Write};
+use std::io::{Read, Write};
 use std::io::{self};
 
 use super::mailbox::Mailbox;

src/error.rs

@@ -1,5 +1,3 @@
-extern crate openssl;
-
 use std::io::{self};
 use std::result;
 use std::fmt::{self};