diff --git a/src/source.rs b/src/source.rs
index 36cd70b..fa4a53c 100644
--- a/src/source.rs
+++ b/src/source.rs
@@ -6,7 +6,6 @@ use std::{
     cell::{Ref, RefCell},
     hash::Hash,
     io::{BufRead, BufReader, BufWriter},
-    mem::{self, MaybeUninit},
     ops::Deref,
     ptr,
     sync::{Arc, Mutex, OnceLock},