Update check files

Type lambdas don't print with variances anymore

Author: odersky

tests/run-macros/tasty-simplified.check

@@ -1,4 +1,4 @@
-Functor[[+A >: scala.Nothing <: scala.Any] => scala.collection.immutable.List[+A]]
+Functor[[A >: scala.Nothing <: scala.Any] => scala.collection.immutable.List[A]]
 Functor[Const[scala.Int]]
 Functor[Id]
-Functor[[+A >: scala.Nothing <: scala.Any] => scala.Option[+A]]
+Functor[[A >: scala.Nothing <: scala.Any] => scala.Option[A]]

tests/run-staging/i5965.check

@@ -1,11 +1,11 @@
 {
-  val y: [+A >: scala.Nothing <: scala.Any] => scala.collection.immutable.List[+A][scala.Int] = scala.List.apply[scala.Int](1, 2, 3)
+  val y: [A >: scala.Nothing <: scala.Any] => scala.collection.immutable.List[A][scala.Int] = scala.List.apply[scala.Int](1, 2, 3)
 
   (y: scala.collection.immutable.List[scala.Int])
 }
 List(1, 2, 3)
 {
-  val y: [+A >: scala.Nothing <: scala.Any] => scala.Option[+A][scala.Int] = scala.Option.apply[scala.Int](4)
+  val y: [A >: scala.Nothing <: scala.Any] => scala.Option[A][scala.Int] = scala.Option.apply[scala.Int](4)
 
   (y: scala.Option[scala.Int])
 }