The `use errors::*` in mymodule causes an unused import warning

main.rs

#![recursion_limit = "1024"]

#[macro_use]
extern crate error_chain;

mod errors {
    error_chain!{}
}

use errors::*;

mod mymodule;
quick_main!(mymodule::run);

mymodule.rs

// Is this the correct way to pull error-chain into the module?
// It gives an unused import warning. 
use errors::*;

pub fn run() -> Result<()> {
    // This operation will fail
    use std::fs::File;
    File::open("tretrete")
        .chain_err(|| "unable to open tretrete file")?;

    Ok(())
}