Remove deprecation warnings from existing tests

Author: ausmarton

Diff for: compiler/test-resources/repl/i13208.scala

@@ -1,8 +1,3 @@
 //> using options -source:future -deprecation
 scala> type M[X] = X match { case Int => String case _ => Int }
-scala> type N[X] = X match { case List[_] => Int }
-1 warning found
--- Deprecation Warning: --------------------------------------------------------
-1 | type N[X] = X match { case List[_] => Int }
-  |                                 ^
-  |        `_` is deprecated for wildcard arguments of types: use `?` instead
+scala> type N[X] = X match { case List[_] => Int }

Diff for: sbt-test/compilerReporter/i14576/Test.scala

@@ -13,5 +13,4 @@ object Test:
   // private[this] and = _ are deprecated under -source:future
   private[this] var x: AnyRef = _
 
-  // under -source:future, `_` is deprecated for wildcard arguments of types: use `?` instead
   val xs: List[_] = Nil

Diff for: sbt-test/compilerReporter/i14576/build.sbt

@@ -24,7 +24,7 @@ lazy val root = (project in file("."))
     },
     assertDeprecationSummary := {
       assert {
-        FakePrintWriter.messages.exists(_.contains("there were 3 deprecation warnings; re-run with -deprecation for details"))
+        FakePrintWriter.messages.exists(_.contains("there were 2 deprecation warnings; re-run with -deprecation for details"))
       }
     },
     assertNoDeprecationSummary := {