Remove dead code

Author: nicolasstucki

compiler/src/dotty/tools/dotc/core/quoted/PickledQuotes.scala

@@ -50,17 +50,6 @@ object PickledQuotes {
     healOwner(tpe1.typeTree)
   }
 
-  private def dealiasTypeTags(tp: Type)(implicit ctx: Context): Type = new TypeMap() {
-    override def apply(tp: Type): Type = {
-      val tp1 = tp match {
-        case tp: TypeRef if tp.typeSymbol.hasAnnotation(defn.InternalQuoted_QuoteTypeTagAnnot) =>
-          tp.symbol.info.hiBound
-        case _ => tp
-      }
-      mapOver(tp1)
-    }
-  }.apply(tp)
-
   /** Unpickle the tree contained in the TastyExpr */
   def unpickleExpr(tasty: PickledQuote, splices: PickledArgs)(implicit ctx: Context): Tree = {
     val tastyBytes = TastyString.unpickle(tasty)