refactor: Remove unused imports

src/digest_engine/program.rs

@@ -2,11 +2,9 @@ use anyhow::{anyhow, Result};
 use log::*;
 use std::env;
 use std::fs;
-use std::fs::File;
 use std::io;
 use std::io::Write;
 use std::os::unix::fs::PermissionsExt;
-use std::path::PathBuf;
 use std::process::{Command, Stdio};
 
 use crate::digest_engine::DigestEngine;