Registry: remove "ide.scroll.background.wide" property

platform/platform-api/src/com/intellij/ui/components/DefaultScrollBarUI.java

@@ -122,10 +122,6 @@ class DefaultScrollBarUI extends ScrollBarUI {
 
   void paintTrack(Graphics2D g, int x, int y, int width, int height, JComponent c) {
     RegionPainter<Float> p = ScrollColorProducer.isDark(c) ? ScrollPainter.Track.DARCULA : ScrollPainter.Track.DEFAULT;
-    if (!isTrackExpandable() && Registry.is("ide.scroll.background.wide")) {
-      p.paint(g, x, y, width, height, myTrackAnimator.myValue);
-      return; // temporary registry key for designer
-    }
     paint(p, g, x, y, width, height, c, myTrackAnimator.myValue, false);
   }
 

platform/util/resources/misc/registry.properties

@@ -115,7 +115,6 @@ ide.scroll.default.unit.increment.description=Use default unit increment from Ja
 ide.scroll.new.layout=true
 ide.scroll.align.component=true
 ide.scroll.background.auto=true
-ide.scroll.background.wide=false
 ide.scroll.bar.expand.animation=false
 ide.scroll.track.border.paint=false
 ide.scroll.thumb.border.rounded=false