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

js/js.translator/testData/box/crossModuleRefIR/inlineJsModule.kt

@@ -1,4 +1,3 @@
-// IGNORE_FIR
 // SPLIT_PER_MODULE
 // EXPECTED_REACHABLE_NODES: 1316
 // MODULE: lib1
@@ -24,4 +23,4 @@ inline fun bar() = foo()
 // MODULE_KIND: AMD
 // FILE: main.kt
 
-fun box() = bar()
+fun box() = bar()