don't generate two 'flatMap' methods(*) for Iterator

* with the same erased signature
 #KT-3373 Fixed

libraries/stdlib/src/generated/_Collections.kt

@@ -35,6 +35,13 @@ public inline fun <T, R> Collection<T>.map(transform : (T) -> R) : List<R> {
     return mapTo(ArrayList<R>(), transform)
 }
 
+/**
+ * Returns the result of transforming each element to one or more values which are concatenated together into a single list
+ */
+public inline fun <T, R> Collection<T>.flatMap(transform: (T)-> Iterable<R>) : List<R> {
+    return flatMapTo(ArrayList<R>(), transform)
+}
+
 /**
  * Returns a list containing the first *n* elements
  */

libraries/stdlib/src/generated/_Iterables.kt

@@ -90,13 +90,6 @@ public inline fun <T, R, C: MutableCollection<in R>> Iterable<T>.mapTo(result: C
     return result
 }
 
-/**
- * Returns the result of transforming each element to one or more values which are concatenated together into a single list
- */
-public inline fun <T, R> Iterable<T>.flatMap(transform: (T)-> Iterable<R>) : List<R> {
-    return flatMapTo(ArrayList<R>(), transform)
-}
-
 /**
  * Returns the result of transforming each element to one or more values which are concatenated together into a single collection
  */

libraries/stdlib/src/generated/_IteratorsCommon.kt

@@ -90,13 +90,6 @@ public inline fun <T, R, C: MutableCollection<in R>> Iterator<T>.mapTo(result: C
     return result
 }
 
-/**
- * Returns the result of transforming each element to one or more values which are concatenated together into a single list
- */
-public inline fun <T, R> Iterator<T>.flatMap(transform: (T)-> Iterable<R>) : List<R> {
-    return flatMapTo(ArrayList<R>(), transform)
-}
-
 /**
  * Returns the result of transforming each element to one or more values which are concatenated together into a single collection
  */