simplified the library code to avoid some JS compile errors

libraries/stdlib/src/kotlin/JLangIterablesLazy.kt

@@ -85,13 +85,14 @@ public inline fun <in T> java.lang.Iterable<T?>?.requireNoNulls() : List<T> {
  * @includeFunctionBody ../../test/CollectionTest.kt drop
  */
 public inline fun <T> java.lang.Iterable<T>.drop(n: Int): List<T> {
-    fun countTo(n: Int): (T) -> Boolean {
-      var count = 0
-      return { ++count; count <= n }
-    }
     return dropWhile(countTo(n))
 }
 
+private fun <T> countTo(n: Int): (T) -> Boolean {
+  var count = 0
+  return { ++count; count <= n }
+}
+
 /**
  * Returns a list containing the everything but the first elements that satisfy the given *predicate*
  *
@@ -105,10 +106,6 @@ public inline fun <T> java.lang.Iterable<T>.dropWhile(predicate: (T) -> Boolean)
  * @includeFunctionBody ../../test/CollectionTest.kt take
  */
 public inline fun <T> java.lang.Iterable<T>.take(n: Int): List<T> {
-    fun countTo(n: Int): (T) -> Boolean {
-      var count = 0
-      return { ++count; count <= n }
-    }
     return takeWhile(countTo(n))
 }
 

libraries/stdlib/src/kotlin/JLangIterablesSpecial.kt

@@ -94,8 +94,7 @@ public fun <T> java.lang.Iterable<T>.contains(item : T) : Boolean {
 public fun <T> java.lang.Iterable<T>.withIndices() : java.lang.Iterable<#(Int, T)> {
     return object : java.lang.Iterable<#(Int, T)> {
         public override fun iterator(): java.util.Iterator<#(Int, T)> {
-            // TODO explicit typecast as a workaround for KT-1457, should be removed when it is fixed
-            return NumberedIterator<T>(this@withIndices.iterator().sure()) as java.util.Iterator<#(Int, T)>
+            return NumberedIterator<T>(this@withIndices.iterator()!!)
         }
     }
 }