diff --git a/crates/fj-interop/src/ext.rs b/crates/fj-interop/src/ext.rs
index 1a04248ee..cc5e5311e 100644
--- a/crates/fj-interop/src/ext.rs
+++ b/crates/fj-interop/src/ext.rs
@@ -13,11 +13,6 @@ pub trait ArrayExt<T, const N: usize> {
     fn try_map_ext<F, U, E>(self, f: F) -> Result<[U; N], E>
     where
         F: FnMut(T) -> Result<U, E>;
-
-    /// Stable replacement for `zip`
-    ///
-    /// <https://doc.rust-lang.org/std/primitive.array.html#method.zip>
-    fn zip_ext<U>(self, rhs: [U; N]) -> [(T, U); N];
 }
 
 impl<T> ArrayExt<T, 2> for [T; 2] {
@@ -33,13 +28,6 @@ impl<T> ArrayExt<T, 2> for [T; 2] {
         let [a, b] = self.map(f);
         Ok([a?, b?])
     }
-
-    fn zip_ext<U>(self, rhs: [U; 2]) -> [(T, U); 2] {
-        let [a, b] = self;
-        let [c, d] = rhs;
-
-        [(a, c), (b, d)]
-    }
 }
 
 impl<T> ArrayExt<T, 4> for [T; 4] {
@@ -55,13 +43,6 @@ impl<T> ArrayExt<T, 4> for [T; 4] {
         let [a, b, c, d] = self.map(f);
         Ok([a?, b?, c?, d?])
     }
-
-    fn zip_ext<U>(self, rhs: [U; 4]) -> [(T, U); 4] {
-        let [a, b, c, d] = self;
-        let [e, f, g, h] = rhs;
-
-        [(a, e), (b, f), (c, g), (d, h)]
-    }
 }
 
 /// Extension trait for arrays