--- a/src/Pure/System/color_value.scala	Sat Sep 21 22:48:52 2013 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,48 +0,0 @@
-/*  Title:      Pure/System/color_value.scala
-    Module:     PIDE
-    Author:     Makarius
-
-Cached color values.
-*/
-
-package isabelle
-
-
-import java.awt.Color
-
-
-object Color_Value
-{
-  private var cache = Map.empty[String, Color]
-
-  def parse(s: String): Color =
-  {
-    val i = java.lang.Long.parseLong(s, 16)
-    val r = ((i >> 24) & 0xFF).toInt
-    val g = ((i >> 16) & 0xFF).toInt
-    val b = ((i >> 8) & 0xFF).toInt
-    val a = (i & 0xFF).toInt
-    new Color(r, g, b, a)
-  }
-
-  def print(c: Color): String =
-  {
-    val r = new java.lang.Integer(c.getRed)
-    val g = new java.lang.Integer(c.getGreen)
-    val b = new java.lang.Integer(c.getBlue)
-    val a = new java.lang.Integer(c.getAlpha)
-    String.format("%02x%02x%02x%02x", r, g, b, a).toUpperCase
-  }
-
-  def apply(s: String): Color =
-    synchronized {
-      cache.get(s) match {
-        case Some(c) => c
-        case None =>
-          val c = parse(s)
-          cache += (s -> c)
-          c
-      }
-    }
-}
-