Fixed up some unused-imports warnings

src/book/bookitem.rs

@@ -2,7 +2,6 @@ use serde::{Serialize, Serializer};
 use serde::ser::SerializeStruct;
 use std::path::PathBuf;
 
-use errors::*;
 
 #[derive(Debug, Clone)]
 pub enum BookItem {

src/book/mod.rs

@@ -4,7 +4,7 @@ pub use self::bookitem::{BookItem, BookItems};
 
 use std::path::{Path, PathBuf};
 use std::fs::{self, File};
-use std::io::{self, Read, Write};
+use std::io::{Read, Write};
 use std::process::Command;
 
 use {theme, parse, utils};

src/utils/fs.rs

@@ -1,6 +1,6 @@
 use std::path::{Path, PathBuf, Component};
 use errors::*;
-use std::io::{self, Read};
+use std::io::Read;
 use std::fs::{self, File};
 
 /// Takes a path to a file and try to read the file into a String