drop noop SVG quality implementation

altought it would be pretty easy to implement it seems to be in somewhat
unsupported state anyway, for reference:
https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/shape-rendering
https://developer.mozilla.org/en-US/docs/Web/CSS/image-rendering

Signed-off-by: Ivailo Monev <xakepa10@gmail.com>

src/svg/qsvgnode.cpp

@@ -42,10 +42,6 @@ void QSvgNode::appendStyleProperty(QSvgStyleProperty *prop, const QString &id)
 {
     //qDebug()<<"appending "<<prop->type()<< " ("<< id <<") "<<"to "<<this<<this->type();
     switch (prop->type()) {
-        case QSvgStyleProperty::QUALITY: {
-            m_style.quality = static_cast<QSvgQualityStyle*>(prop);
-            break;
-        }
         case QSvgStyleProperty::FILL: {
             m_style.fill = static_cast<QSvgFillStyle*>(prop);
             break;
@@ -110,10 +106,6 @@ QSvgStyleProperty * QSvgNode::styleProperty(QSvgStyleProperty::Type type) const
     const QSvgNode *node = this;
     while (node) {
         switch (type) {
-        case QSvgStyleProperty::QUALITY:
-            if (node->m_style.quality)
-                return node->m_style.quality;
-            break;
         case QSvgStyleProperty::FILL:
             if (node->m_style.fill)
                 return node->m_style.fill;

src/svg/qsvgstyle.cpp

@@ -60,20 +60,6 @@ void QSvgFillStyleProperty::revert(QPainter *, QSvgExtraStates &)
     Q_ASSERT(!"This should not be called!");
 }
 
-
-QSvgQualityStyle::QSvgQualityStyle(int color)
-{
-    Q_UNUSED(color);
-}
-void QSvgQualityStyle::apply(QPainter *, const QSvgNode *, QSvgExtraStates &)
-{
-
-}
-void QSvgQualityStyle::revert(QPainter *, QSvgExtraStates &)
-{
-
-}
-
 QSvgFillStyle::QSvgFillStyle()
     : m_style(0)
     , m_fillRule(Qt::WindingFill)
@@ -425,11 +411,6 @@ void QSvgTransformStyle::revert(QPainter *p, QSvgExtraStates &)
     p->setWorldTransform(m_oldWorldTransform, false /* don't combine */);
 }
 
-QSvgStyleProperty::Type QSvgQualityStyle::type() const
-{
-    return QUALITY;
-}
-
 QSvgStyleProperty::Type QSvgFillStyle::type() const
 {
     return FILL;
@@ -494,10 +475,6 @@ QSvgStyle::~QSvgStyle()
 
 void QSvgStyle::apply(QPainter *p, const QSvgNode *node, QSvgExtraStates &states)
 {
-    if (quality) {
-        quality->apply(p, node, states);
-    }
-
     if (fill) {
         fill->apply(p, node, states);
     }
@@ -529,10 +506,6 @@ void QSvgStyle::apply(QPainter *p, const QSvgNode *node, QSvgExtraStates &states
 
 void QSvgStyle::revert(QPainter *p, QSvgExtraStates &states)
 {
-    if (quality) {
-        quality->revert(p, states);
-    }
-
     if (fill) {
         fill->revert(p, states);
     }

src/svg/qsvgstyle_p.h

@@ -134,7 +134,6 @@ class QSvgStyleProperty : public QSvgRefCounted
 public:
     enum Type
     {
-        QUALITY,
         FILL,
         VIEWPORT_FILL,
         FONT,
@@ -160,38 +159,6 @@ public:
     virtual void revert(QPainter *p, QSvgExtraStates &states);
 };
 
-class QSvgQualityStyle : public QSvgStyleProperty
-{
-public:
-    QSvgQualityStyle(int color);
-    virtual void apply(QPainter *p, const QSvgNode *node, QSvgExtraStates &states);
-    virtual void revert(QPainter *p, QSvgExtraStates &states);
-    virtual Type type() const;
-private:
-    // color-render ing v 	v 	'auto' | 'optimizeSpeed' |
-    //                                  'optimizeQuality' | 'inherit'
-    //int m_colorRendering;
-
-    // shape-rendering v 	v 	'auto' | 'optimizeSpeed' | 'crispEdges' |
-    //                                  'geometricPrecision' | 'inherit'
-    //QSvgShapeRendering m_shapeRendering;
-
-
-    // text-rendering    v 	v 	'auto' | 'optimizeSpeed' | 'optimizeLegibility'
-    //                                | 'geometricPrecision' | 'inherit'
-    //QSvgTextRendering m_textRendering;
-
-
-    // vector-effect         v 	x 	'default' | 'non-scaling-stroke' | 'inherit'
-    //QSvgVectorEffect m_vectorEffect;
-
-    // image-rendering v 	v 	'auto' | 'optimizeSpeed' | 'optimizeQuality' |
-    //                                      'inherit'
-    //QSvgImageRendering m_imageRendering;
-};
-
-
-
 class QSvgOpacityStyle : public QSvgStyleProperty
 {
 public:
@@ -624,8 +591,7 @@ class QSvgStyle
 {
 public:
     QSvgStyle()
-        : quality(0),
+        : fill(0),
-          fill(0),
           viewportFill(0),
           font(0),
           stroke(0),
@@ -639,7 +605,7 @@ public:
 
     void apply(QPainter *p, const QSvgNode *node, QSvgExtraStates &states);
     void revert(QPainter *p, QSvgExtraStates &states);
-    QSvgRefCounter<QSvgQualityStyle>      quality;
+
     QSvgRefCounter<QSvgFillStyle>         fill;
     QSvgRefCounter<QSvgViewportFillStyle> viewportFill;
     QSvgRefCounter<QSvgFontStyle>         font;