Drop Tuple.Zip unreachable match type case

Addressing #19175

Author: EugeneFlesselle

Diff for: library/src/scala/Tuple.scala

@@ -183,7 +183,6 @@ object Tuple {
     case (h1 *: t1, h2 *: t2) => (h1, h2) *: Zip[t1, t2]
     case (EmptyTuple, _) => EmptyTuple
     case (_, EmptyTuple) => EmptyTuple
-    case _ => Tuple
   }
 
   /** Converts a tuple `(F[T1], ..., F[Tn])` to `(T1,  ... Tn)` */