refactor: switch to new fetch module; remove get_url_contents and warn

Co-authored-by: aider (openai/gpt-5) <[email protected]>

Author: gtfierro

lib/src/io.rs

@@ -4,7 +4,7 @@
 use crate::errors::OfflineRetrievalError;
 use crate::ontology::{GraphIdentifier, Ontology, OntologyLocation};
 use crate::options::Overwrite;
-use crate::util::{get_file_contents, get_url_contents};
+use crate::util::get_file_contents;
 use anyhow::{anyhow, Error, Result};
 use chrono::prelude::*;
 use fs2::FileExt;

lib/src/util.rs

@@ -14,7 +14,7 @@ use oxigraph::model::{GraphNameRef, Quad, Triple, TripleRef};
 
 use std::io::BufReader;
 
-use log::{debug, info, warn};
+use log::{debug, info};
 
 pub fn get_file_contents(path: &Path) -> Result<(Vec<u8>, Option<RdfFormat>)> {
     let b = std::fs::read(path)?;