diff --git a/crates/cli-support/src/js/mod.rs b/crates/cli-support/src/js/mod.rs
index 3390d8a0..f73065bb 100644
--- a/crates/cli-support/src/js/mod.rs
+++ b/crates/cli-support/src/js/mod.rs
@@ -1264,60 +1264,6 @@ impl<'a> Context<'a> {
         }
     }
 
-    fn expose_commit_slice_to_wasm(&mut self, ty: VectorKind)
-        -> Result<&'static str, Error>
-    {
-        let gen = |me: &mut Context, name: &'static str, size: usize, get: &str| {
-            me.global(&format!("
-                function {name}(ptr, view) {{
-                    if (view.buffer !== wasm.memory.buffer)
-                        {get}().set(view, ptr / {size});
-                }}
-            ",
-                name = name,
-                size = size,
-                get = get,
-            ));
-            name
-        };
-        match ty {
-            VectorKind::String => bail!("strings cannot be used with mutable slices"),
-            VectorKind::Anyref => bail!("js values cannot be used with mutable slices"),
-            VectorKind::I8 => {
-                self.expose_int8_memory();
-                Ok(gen(self, "commitI8ToWasm", 1, "getInt8Memory"))
-            }
-            VectorKind::U8 => {
-                self.expose_uint8_memory();
-                Ok(gen(self, "commitU8ToWasm", 1, "getUint8Memory"))
-            }
-            VectorKind::I16 => {
-                self.expose_int16_memory();
-                Ok(gen(self, "commitI16ToWasm", 2, "getInt16Memory"))
-            }
-            VectorKind::U16 => {
-                self.expose_uint16_memory();
-                Ok(gen(self, "commitU16ToWasm", 2, "getUint16Memory"))
-            }
-            VectorKind::I32 => {
-                self.expose_int32_memory();
-                Ok(gen(self, "commitI32ToWasm", 4, "getInt32Memory"))
-            }
-            VectorKind::U32 => {
-                self.expose_uint32_memory();
-                Ok(gen(self, "commitU32ToWasm", 4, "getUint32Memory"))
-            }
-            VectorKind::F32 => {
-                self.expose_f32_memory();
-                Ok(gen(self, "commitF32ToWasm", 4, "getFloat32Memory"))
-            }
-            VectorKind::F64 => {
-                self.expose_f64_memory();
-                Ok(gen(self, "commitF64ToWasm", 8, "getFloat64Memory"))
-            }
-        }
-    }
-
     fn expose_get_global_argument(&mut self) -> Result<(), Error> {
         if !self.exposed_globals.insert("get_global_argument") {
             return Ok(());
diff --git a/crates/cli-support/src/js/rust2js.rs b/crates/cli-support/src/js/rust2js.rs
index 874d2bf0..15296081 100644
--- a/crates/cli-support/src/js/rust2js.rs
+++ b/crates/cli-support/src/js/rust2js.rs
@@ -93,9 +93,6 @@ impl<'a, 'b> Rust2Js<'a, 'b> {
                     wasm.__wbindgen_free({0}, {1} * {size});\
                 ", abi, abi2, size = ty.size()));
                 self.cx.require_internal_export("__wbindgen_free")?;
-            } else if arg.is_mut_ref() {
-                let f = self.cx.expose_commit_slice_to_wasm(ty)?;
-                self.finally(&format!("{}({1}, v{1});", f, abi));
             }
             self.js_arguments.push(format!("v{}", abi));
             return Ok(())
diff --git a/tests/all/slice.rs b/tests/all/slice.rs
index 13a59bb2..e5e3f13f 100644
--- a/tests/all/slice.rs
+++ b/tests/all/slice.rs
@@ -357,90 +357,6 @@ fn import_mut() {
         .test();
 }
 
-#[test]
-fn import_mut_realloc_middle() {
-    project()
-        .file("src/lib.rs", r#"
-            #![feature(proc_macro, wasm_custom_section, wasm_import_module)]
-
-            extern crate wasm_bindgen;
-
-            use wasm_bindgen::prelude::*;
-
-            macro_rules! doit {
-                ($(($rust:ident, $js:ident, $i:ident))*) => (
-                    $(
-                        #[wasm_bindgen(module = "./test")]
-                        extern {
-                            fn $js(a: &mut [$i]);
-                        }
-
-                        fn $rust() {
-                            let mut buf = [
-                                1 as $i,
-                                2 as $i,
-                                3 as $i,
-                            ];
-                            $js(&mut buf);
-                            assert_eq!(buf[0], 4 as $i);
-                            assert_eq!(buf[1], 5 as $i);
-                            assert_eq!(buf[2], 3 as $i);
-                        }
-                    )*
-
-                    #[wasm_bindgen]
-                    pub fn run() {
-                        $($rust();)*
-                    }
-
-                    #[wasm_bindgen]
-                    pub fn allocate() {
-                        std::mem::forget(Vec::<u8>::with_capacity(128 * 1024));
-                    }
-                )
-            }
-
-
-            doit! {
-                (rust_i8, js_i8, i8)
-                (rust_u8, js_u8, u8)
-                (rust_i16, js_i16, i16)
-                (rust_u16, js_u16, u16)
-                (rust_i32, js_i32, i32)
-                (rust_u32, js_u32, u32)
-                (rust_f32, js_f32, f32)
-                (rust_f64, js_f64, f64)
-            }
-        "#)
-        .file("test.ts", r#"
-            import * as assert from "assert";
-            import * as wasm from "./out";
-
-            function foo(a: any) {
-                wasm.allocate();
-                assert.strictEqual(a.length, 3);
-                assert.strictEqual(a[0], 1);
-                assert.strictEqual(a[1], 2);
-                a[0] = 4;
-                a[1] = 5;
-            }
-
-            export const js_i8 = foo;
-            export const js_u8 = foo;
-            export const js_i16 = foo;
-            export const js_u16 = foo;
-            export const js_i32 = foo;
-            export const js_u32 = foo;
-            export const js_f32 = foo;
-            export const js_f64 = foo;
-
-            export function test() {
-                wasm.run();
-            }
-        "#)
-        .test();
-}
-
 #[test]
 fn export_mut() {
     project()