Fix clippy lints

Author: Heliozoa

crates/tmc-langs-util/src/file_util.rs

@@ -17,7 +17,7 @@ use std::{
     ops::{Deref, DerefMut},
     path::{Path, PathBuf},
 };
-use tempfile::{NamedTempFile, TempDir};
+use tempfile::NamedTempFile;
 use walkdir::WalkDir;
 
 /// Convenience macro for locking a path.