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

js/js.translator/testData/box/inlineMultiModule/localObjectLiteralWithInheritance.kt

@@ -1,4 +1,3 @@
-// IGNORE_FIR
 // EXPECTED_REACHABLE_NODES: 1302
 // MODULE: lib
 // FILE: lib.kt
@@ -22,4 +21,4 @@ inline fun foo(x: String): A {
 // MODULE: main(lib)
 // FILE: main.kt
 
-fun box(): String = foo("O").f()
+fun box(): String = foo("O").f()