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

js/js.translator/testData/box/regression/wrappers.kt

@@ -1,4 +1,3 @@
-// IGNORE_FIR
 // EXPECTED_REACHABLE_NODES: 1309
 // KJS_WITH_FULL_RUNTIME
 
@@ -18,4 +17,4 @@ fun foo(context: I) =
 fun box(): String {
     foo(object : I {})
     return "OK"
-}
+}