Function and Constructor converted; no longer emit 'open' modifier for private functions

tests/testData/ast/class/file/privateInit.kt

@@ -1,4 +1,4 @@
 public open class MyClass() {
-private open fun init(arg1 : Int, arg2 : Int, arg3 : Int) : Unit {
+private fun init(arg1 : Int, arg2 : Int, arg3 : Int) : Unit {
 }
 }

tests/testData/ast/constructors/file/customerBuilder.kt

@@ -8,9 +8,9 @@ return _firstName
 public open fun getLastName() : String? {
 return _lastName
 }
-private open fun doSmthBefore() : Unit {
+private fun doSmthBefore() : Unit {
 }
-private open fun doSmthAfter() : Unit {
+private fun doSmthAfter() : Unit {
 }
 {
 doSmthBefore()