Made TypeBoundsTrees to be TypTrees so they are eliminated by PostTyperTransform

Author: odersky

src/dotty/tools/dotc/ast/Trees.scala

@@ -644,7 +644,7 @@ object Trees {
 
   /** >: lo <: hi */
   case class TypeBoundsTree[-T >: Untyped] private[ast] (lo: Tree[T], hi: Tree[T])
-    extends Tree[T] {
+    extends TypTree[T] {
     type ThisTree[-T >: Untyped] = TypeBoundsTree[T]
   }
 

src/dotty/tools/dotc/typer/Typer.scala

@@ -88,7 +88,6 @@ class Typer extends Namer with Applications with Implicits {
     if (reallyExists(mbr)) site.select(name, mbr)
     else {
       if (!site.isErroneous) {
-        typr.println(s"site = $site, baseClasses = ${site.baseClasses}")
         ctx.error(
           if (name == nme.CONSTRUCTOR) i"$site does not have a constructor"
           else i"$name is not a member of $site", pos)