diff --git a/runtime/wasm/effect.wat b/runtime/wasm/effect.wat
index 32efa77662..02bbd147a7 100644
--- a/runtime/wasm/effect.wat
+++ b/runtime/wasm/effect.wat
@@ -769,26 +769,4 @@
                (throw $ocaml_exception (local.get $exn)))))
       (global.set $effect_allowed (local.get $saved_effect_allowed))
       (local.get $res))
-
-(@if wasi
-(@then
-   (func (export "%perform") (param (ref eq)) (result (ref eq))
-      (call $caml_failwith (@string "perform not implemented"))
-      (ref.i31 (i32.const 0)))
-
-   (func (export "%reperform")
-      (param (ref eq) (ref eq) (ref eq)) (result (ref eq))
-      (call $caml_failwith (@string "reperform not implemented"))
-      (ref.i31 (i32.const 0)))
-
-   (func (export "%resume")
-      (param (ref eq) (ref eq) (ref eq) (ref eq)) (result (ref eq))
-      (call $caml_failwith (@string "resume not implemented"))
-      (ref.i31 (i32.const 0)))
-
-   (func (export "caml_alloc_stack")
-      (param (ref eq) (ref eq) (ref eq)) (result (ref eq))
-      (call $caml_failwith (@string "caml_alloc_stack not implemented"))
-      (ref.i31 (i32.const 0)))
-))
 )