remove unreachable case in pattern match

Author: hamzaremmal

library/src/scala/runtime/ScalaRunTime.scala

@@ -276,7 +276,6 @@ object ScalaRunTime {
   /** stringOf formatted for use in a repl result. */
   def replStringOf(arg: Any, maxElements: Int): String =
     stringOf(arg, maxElements) match {
-      case null => "null toString"
       case s if s.indexOf('\n') >= 0 => "\n" + s + "\n"
       case s => s + "\n"
     }