get rid of unused import warnings for Read/Write

Author: saghm

src/cursor.rs

@@ -34,7 +34,6 @@ use wire_protocol::flags::OpQueryFlags;
 use wire_protocol::operations::Message;
 
 use std::collections::vec_deque::VecDeque;
-use std::io::{Read, Write};
 
 pub const DEFAULT_BATCH_SIZE: i32 = 20;
 

src/gridfs/file.rs

@@ -14,7 +14,7 @@ use coll::options::IndexOptions;
 
 use std::{cmp, io, thread};
 use std::error::Error as ErrorTrait;
-use std::io::{Read, Write};
+use std::io::Write;
 use std::ops::{Deref, DerefMut};
 use std::sync::{Arc, Condvar, Mutex, RwLock};
 use std::sync::atomic::{AtomicIsize, ATOMIC_ISIZE_INIT, Ordering};

tests/v3_0/client/wire_protocol.rs

@@ -1,10 +1,8 @@
 use bson::{Bson, Document};
 use mongodb::{Client, ThreadedClient};
 use mongodb::db::{ThreadedDatabase};
-use mongodb::wire_protocol::flags::{OpInsertFlags, OpQueryFlags,
-                                            OpUpdateFlags};
+use mongodb::wire_protocol::flags::{OpInsertFlags, OpQueryFlags, OpUpdateFlags};
 use mongodb::wire_protocol::operations::Message;
-use std::io::Write;
 use std::net::TcpStream;
 
 fn drop_db() {

tests/v3_2/client/wire_protocol.rs

@@ -1,10 +1,8 @@
 use bson::{Bson, Document};
 use mongodb::{Client, ThreadedClient};
 use mongodb::db::{ThreadedDatabase};
-use mongodb::wire_protocol::flags::{OpInsertFlags, OpQueryFlags,
-                                            OpUpdateFlags};
+use mongodb::wire_protocol::flags::{OpInsertFlags, OpQueryFlags, OpUpdateFlags};
 use mongodb::wire_protocol::operations::Message;
-use std::io::Write;
 use std::net::TcpStream;
 
 fn drop_db() {