Remove unused imports

src/factor/factor.rs

@@ -22,7 +22,6 @@ extern crate uucore;
 
 use numeric::*;
 use prime_table::P_INVS_U64;
-use rand::weak_rng;
 use rand::distributions::{Range, IndependentSample};
 use std::cmp::{max, min};
 use std::io::{stdin, BufRead, BufReader, Write};

src/shuf/shuf.rs

@@ -16,8 +16,7 @@ extern crate rand;
 #[macro_use]
 extern crate uucore;
 
-use rand::{Rng, ThreadRng};
-use rand::read::ReadRng;
+use rand::Rng;
 use std::fs::File;
 use std::io::{stdin, stdout, BufReader, BufWriter, Read, Write};
 use std::usize::MAX as MAX_USIZE;

src/timeout/timeout.rs

@@ -16,7 +16,6 @@ extern crate time;
 #[macro_use]
 extern crate uucore;
 
-use libc::pid_t;
 use std::io::{ErrorKind, Write};
 use std::process::{Command, Stdio};
 use std::os::unix::process::ExitStatusExt;