effect: Drop WindowPaintData::screen

It's unused.

src/effect/effect.cpp

@@ -213,7 +213,6 @@ public:
     qreal opacity;
     qreal saturation;
     qreal brightness;
-    int screen;
     qreal crossFadeProgress;
 };
 
@@ -224,7 +223,6 @@ WindowPaintData::WindowPaintData()
     setOpacity(1.0);
     setSaturation(1.0);
     setBrightness(1.0);
-    setScreen(0);
     setCrossFadeProgress(0.0);
 }
 
@@ -242,7 +240,6 @@ WindowPaintData::WindowPaintData(const WindowPaintData &other)
     setOpacity(other.opacity());
     setSaturation(other.saturation());
     setBrightness(other.brightness());
-    setScreen(other.screen());
     setCrossFadeProgress(other.crossFadeProgress());
 }
 
@@ -263,11 +260,6 @@ qreal WindowPaintData::brightness() const
     return d->brightness;
 }
 
-int WindowPaintData::screen() const
-{
-    return d->screen;
-}
-
 void WindowPaintData::setOpacity(qreal opacity)
 {
     d->opacity = opacity;
@@ -283,11 +275,6 @@ void WindowPaintData::setBrightness(qreal brightness)
     d->brightness = brightness;
 }
 
-void WindowPaintData::setScreen(int screen) const
-{
-    d->screen = screen;
-}
-
 qreal WindowPaintData::crossFadeProgress() const
 {
     return d->crossFadeProgress;

src/effect/effect.h

@@ -408,18 +408,6 @@ public:
      * @since 4.10
      */
     qreal multiplyBrightness(qreal factor);
-    /**
-     * The screen number for which the painting should be done.
-     * This affects color correction (different screens may need different
-     * color correction lookup tables because they have different ICC profiles).
-     * @return screen for which painting should be done
-     */
-    int screen() const;
-    /**
-     * @param screen New screen number
-     * A value less than 0 will indicate that a default profile should be done.
-     */
-    void setScreen(int screen) const;
     /**
      * @brief Sets the cross fading @p factor to fade over with previously sized window.
      * If @c 1.0 only the current window is used, if @c 0.0 only the previous window is used.