[JS] Remove non-functional IGNORE_FIR directive in js box tests

js/js.translator/testData/box/multiModule/localClassMetadata.kt

@@ -1,4 +1,3 @@
-// IGNORE_FIR
 // KJS_WITH_FULL_RUNTIME
 // EXPECTED_REACHABLE_NODES: 1319
 // MODULE: lib
@@ -71,4 +70,4 @@ fun box(): String {
     if (result != "propA.bar;propI.foo;propAI.foo;propAI.bar;propG.baz;propInner.df;propL.l;propL2.l2") return "fail: $result"
 
     return "OK"
-}
+}