fix: add FromStr import, remove unused compression_engine import

src/modes/save.rs

@@ -3,6 +3,7 @@ use is_terminal::IsTerminal;
 use std::collections::HashMap;
 use std::io::{self, Read};
 use std::path::PathBuf;
+use std::str::FromStr;
 
 use clap::error::ErrorKind;
 use clap::Command;

src/modes/update.rs

@@ -4,7 +4,6 @@ use std::str::FromStr;
 
 use crate::db;
 use crate::compression_engine::CompressionType;
-use crate::compression_engine;
 use clap::error::ErrorKind;
 use clap::Command;
 use log::{debug, info};