Performance: Remove extern C from def_super! for WASM targets.

Author: dylan-sutton-chavez

compiler/src/modules/vm/super_ops.rs

@@ -62,8 +62,8 @@ macro_rules! def_super {
     ) => {
         $(#[$meta])*
         #[inline(never)]
-        #[allow(improper_ctypes_definitions)]
-        $vis extern "C" fn $name($($arg: $ty),*) -> $ret $body
+        #[cold]
+        $vis fn $name($($arg: $ty),*) -> $ret $body
     };
 }