[KT-4124] Fix some tests from common testData

compiler/testData/codegen/box/classes/kt500.kt

@@ -21,8 +21,6 @@ val USER_ID_2 =
 fun getUserIdFromEnvironment() : Int = throw UnsupportedOperationException()
 
 fun box() : String {
-    // Probably, it's an old debugging code. JS backend still does not support this
-    //System.out?.println("G: " + GUEST_USER_ID + " U1:" + USER_ID + " U2: " + USER_ID_2)
     if(USER_ID   != 4) return "test0 failed"
     if(USER_ID_2 != 4) return "test2 failed"
     if(GUEST_USER_ID != 5) return "test3 failed"