Update docs

Author: nicolasstucki

tests/pos/tasty/definitions.scala

@@ -39,19 +39,12 @@ object definitions {
   case class TypeDef(name: String, rhs: TypeTree | TypeBoundsTree) extends Definition {
     def mods: List[Modifier] = ???
   }
-  case class ClassDef(name: String, constructor: DefDef, parents: List[Parent],
+  case class ClassDef(name: String, constructor: DefDef, parents: List[Term | TypeTree],
                       self: Option[ValDef], body: List[Statement]) extends Definition {
     def mods: List[Modifier] = ???
   }
   case class PackageDef(name: String, members: List[Statement]) extends Definition
 
-// ------ Parents--------------------------------
-
-  enum Parent {
-    case TermParent(parent: Term)
-    case TypeParent(parent: TypeTree)
-  }
-
 // ------ Terms ---------------------------------
 
   /** Trees denoting terms */