Fix builds.

src/module/mod.rs

@@ -1676,9 +1676,8 @@ impl Module {
     }
 
     /// Get an iterator to the functions in the [`Module`].
-    #[cfg(not(feature = "no_optimize"))]
-    #[cfg(not(feature = "no_function"))]
     #[inline(always)]
+    #[allow(dead_code)]
     pub(crate) fn iter_fn(&self) -> impl Iterator<Item = &FuncInfo> {
         self.functions.values()
     }