Make IndexingIterator and IndexingIterable internal.

libraries/stdlib/src/kotlin/collections/IndexingIterator.kt

@@ -12,18 +12,14 @@ public data class IndexedValue<out T>(public val index: Int, public val value: T
  * A wrapper over another [Iterable] (or any other object that can produce an [Iterator]) that returns
  * an indexing iterator.
  */
-@Deprecated("This implementation class will become internal soon. Use Iterable<IndexedValue<T>> instead.", ReplaceWith("Iterable<IndexedValue<T>>"))
-public class IndexingIterable<out T>(private val iteratorFactory: () -> Iterator<T>) : Iterable<IndexedValue<T>> {
+internal class IndexingIterable<out T>(private val iteratorFactory: () -> Iterator<T>) : Iterable<IndexedValue<T>> {
     override fun iterator(): Iterator<IndexedValue<T>> = IndexingIterator(iteratorFactory())
 }
 
 /**
  * Iterator transforming original `iterator` into iterator of [IndexedValue], counting index from zero.
  */
-@Deprecated("This implementation class will become internal soon. Use Iterator<IndexedValue<T>> instead.", ReplaceWith("Iterator<IndexedValue<T>>"))
-public class IndexingIterator<out T>
-@Deprecated("This implementation class will become internal soon. Use iterator.withIndex() instead.", ReplaceWith("iterator.withIndex()"))
-constructor(private val iterator: Iterator<T>) : Iterator<IndexedValue<T>> {
+internal class IndexingIterator<out T>(private val iterator: Iterator<T>) : Iterator<IndexedValue<T>> {
     private var index = 0
     final override fun hasNext(): Boolean = iterator.hasNext()
     final override fun next(): IndexedValue<T> = IndexedValue(index++, iterator.next())