Remove unused type parameter.

There should probably be a warning about non-overriding methods
which have unreferenced type parameters.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/library/scala/collection/mutable/ArrayOps.scala b/src/library/scala/collection/mutable/ArrayOps.scala
index 01636eb54e..7a595f211d 100644
--- a/src/library/scala/collection/mutable/ArrayOps.scala
+++ b/src/library/scala/collection/mutable/ArrayOps.scala
@@ -64,7 +64,7 @@ abstract class ArrayOps[T] extends ArrayLike[T, Array[T]] with CustomParalleliza
    *  @param asTrav    A function that converts elements of this array to rows - arrays of type `U`.
    *  @return          An array obtained by concatenating rows of this array.
    */
-  def flatten[U, To](implicit asTrav: T => collection.Traversable[U], m: ClassTag[U]): Array[U] = {
+  def flatten[U](implicit asTrav: T => collection.Traversable[U], m: ClassTag[U]): Array[U] = {
     val b = Array.newBuilder[U]
     b.sizeHint(map{case is: collection.IndexedSeq[_] => is.size case _ => 0}.sum)
     for (xs <- this)