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

js/js.translator/testData/box/multiModuleWrappers/amd/jsModuleOnPackage.kt

@@ -1,4 +1,3 @@
-// IGNORE_FIR
 // EXPECTED_REACHABLE_NODES: 1289
 // MODULE: lib
 // MODULE_KIND: AMD
@@ -44,4 +43,4 @@ fun box(): String {
     assertEquals(523, mbar)
 
     return "OK"
-}
+}