Fix test output

The warning was removed in #12261

Fixes #14332

Author: nicolasstucki

compiler/test-resources/repl/i13208.scala

@@ -1,10 +1,5 @@
 // scalac: -source:future -deprecation
 scala> type M[X] = X match { case Int => String case _ => Int }
-1 warning found
--- Deprecation Warning: --------------------------------------------------------
-1 | type M[X] = X match { case Int => String case _ => Int }
-  |                                               ^
-  |        `_` is deprecated for wildcard arguments of types: use `?` instead
 scala> type N[X] = X match { case List[_] => Int }
 1 warning found
 -- Deprecation Warning: --------------------------------------------------------