Remove unused list of types without prefix

Author: ausmarton

compiler/src/dotty/tools/dotc/printing/PlainPrinter.scala

@@ -140,15 +140,6 @@ class PlainPrinter(_ctx: Context) extends Printer {
       case _ => Nil
     })
 
-  /** Direct references to these symbols are printed without their prefix for convenience.
-   *  They are either aliased in scala.Predef or in the scala package object, as well as `Object`
-   */
-  private lazy val printWithoutPrefix: Set[Symbol] =
-    (defn.ScalaPredefModule.termRef.typeAliasMembers
-      ++ defn.ScalaPackageObject.termRef.typeAliasMembers).map(_.info.classSymbol).toSet
-    + defn.ObjectClass
-    + defn.FromJavaObjectSymbol
-
   def toTextCaptureSet(cs: CaptureSet): Text =
     if printDebug && ctx.settings.YccDebug.value && !cs.isConst then cs.toString
     else if cs == CaptureSet.Fluid then "<fluid>"