refactor: remove unused std::process import

src/compression_engine/program.rs

@@ -6,7 +6,6 @@ use std::fs::File;
 use std::io::{Read, Write};
 use std::os::unix::fs::PermissionsExt;
 use std::path::PathBuf;
-use std::process::{Command, Stdio};
 
 use crate::compression_engine::CompressionEngine;