Removing unused import

Author: davidalber

tests/system.rs

@@ -18,7 +18,7 @@ extern crate term;
 
 use std::collections::HashMap;
 use std::fs;
-use std::io::{self, BufRead, BufReader, Read, Write};
+use std::io::{self, BufRead, BufReader, Read};
 use std::iter::Peekable;
 use std::path::{Path, PathBuf};
 use std::str::Chars;