chore: remove unused utility functions

src/main.rs

@@ -1153,45 +1153,3 @@ fn mode_status(_cmd: &mut Command, args: Args, data_path: PathBuf, db_path: Path
     Ok(())
 }
 
-fn get_meta_from_env() -> HashMap<String,String> {
-    debug!("MAIN: Getting meta from KEEP_META_*");
-    let re = Regex::new(r"^KEEP_META_(.+)$").unwrap();
-    let mut meta_env: HashMap<String,String> = HashMap::new();
-    for (key, value) in env::vars() {
-        if let Some(meta_name_caps) = re.captures(key.as_str()) {
-            let name = String::from(meta_name_caps.get(1).unwrap().as_str());
-            debug!("MAIN: Found meta: {}={}", name.clone(), value.clone());
-            meta_env.insert(name, value.clone());
-        }
-    }
-    meta_env
-}
-
-fn format_size_human_readable(size: u64) -> String {
-    let options = humansize::FormatSizeOptions::from(BINARY)
-        .decimal_places(1);
-
-    humansize::format_size(size, options)
-}
-
-fn format_size(size: u64, human_readable: bool) -> String {
-    match human_readable {
-        true => format_size_human_readable(size),
-        false => size.to_string()
-    }
-}
-
-fn string_column(s: String, column_width: usize) -> String {
-    if column_width > 0 {
-        match s.char_indices().nth(column_width) {
-            None => s.to_string(),
-            Some((idx, _)) => s[..idx].to_string(),
-        }
-    } else {
-        s.to_string()
-    }
-}
-
-fn size_column(size: u64, human_readable: bool, column_width: usize) -> String {
-    string_column(format_size(size, human_readable), column_width)
-}