diff --git a/src/sync.rs b/src/sync.rs
index 53238d0..d6c4f0a 100644
--- a/src/sync.rs
+++ b/src/sync.rs
@@ -62,10 +62,6 @@ pub(crate) mod prelude {
     pub(crate) trait UnsafeCellExt {
         type Value;
 
-        fn with<R, F>(&self, f: F) -> R
-        where
-            F: FnOnce(*const Self::Value) -> R;
-
         fn with_mut<R, F>(&self, f: F) -> R
         where
             F: FnOnce(*mut Self::Value) -> R;
@@ -74,13 +70,6 @@ pub(crate) mod prelude {
     impl<T> UnsafeCellExt for cell::UnsafeCell<T> {
         type Value = T;
 
-        fn with<R, F>(&self, f: F) -> R
-        where
-            F: FnOnce(*const Self::Value) -> R,
-        {
-            f(self.get())
-        }
-
         fn with_mut<R, F>(&self, f: F) -> R
         where
             F: FnOnce(*mut Self::Value) -> R,