[JS TESTS] Remove LANGUAGE_VERSION directive

Some of them are not necessary at all, others can be replaced with
`!LANGUAGE` directive with exclusion of corresponding features.

js/js.translator/testData/box/reflection/primitives-11.kt

@@ -1,5 +1,5 @@
 // EXPECTED_REACHABLE_NODES: 1290
-// LANGUAGE_VERSION: 1.1
+// !LANGUAGE: -ProhibitGenericArrayClassLiteral
 import kotlin.reflect.KClass
 
 fun box(): String {