Remove unused import

Author: alexcrichton

src/bin/playbot.rs

@@ -7,7 +7,7 @@ extern crate rustc_serialize;
 extern crate toml;
 extern crate url;
 
-use std::fs::{self, File};
+use std::fs::File;
 use std::io::{self, Read};
 use std::str;
 use std::u16;