fixup! Add groupMap and groupMapReduce extensions

remove unused type alias

Author: NthPortal

compat/src/main/scala-2.11_2.12/scala/collection/compat/PackageShared.scala

@@ -30,8 +30,6 @@ private[compat] trait PackageShared {
    */
   type Factory[-A, +C] = CanBuildFrom[Nothing, A, C]
 
-  type IsTraversableLikeAux[A1, Repr] = IsTraversableLike[Repr] { type A = A1 }
-
   implicit class FactoryOps[-A, +C](private val factory: Factory[A, C]) {
 
     /**