qtquick: Move dummy QAction class into the pimpl header

No need for it to be in the public header

src/DockWidgetBase.h

@@ -29,10 +29,6 @@
 
 // clazy:excludeall=ctor-missing-parent-argument
 
-QT_BEGIN_NAMESPACE
-class QAction;
-QT_END_NAMESPACE
-
 class TestDocks;
 
 namespace KDDockWidgets {
@@ -498,73 +494,4 @@ private:
 }
 Q_DECLARE_METATYPE(KDDockWidgets::Location)
 
-#if defined(QT_WIDGETS_LIB)
-# include <QAction>
-#else
-// A QAction for QtQuick. Just so it compiles, for now
-class QAction : public QObject
-{
-    Q_OBJECT
-public:
-    using QObject::QObject;
-
-    bool isChecked() const {
-        return m_isChecked ;
-    }
-
-    void setCheckable(bool is) {
-        m_isCheckable = is;
-    }
-
-    void setText(const QString &text) {
-        m_text = text;
-    }
-
-    void setToolTip(const QString &text) {
-        m_toolTip = text;
-    }
-
-    QString toolTip() const {
-        returm m_toolTip;
-    }
-
-    bool enabled() const {
-        return m_enabled;
-    }
-
-    void setEnabled(bool enabled) {
-        m_enabled = enabled;
-    }
-
-    bool checked() const {
-        return m_checked;
-    }
-
-    void setChecked(bool checked) {
-        m_checked = checked;
-    }
-
-    bool isEnabled() const {
-        return m_enabled;
-    }
-
-    void toggle() {
-        m_enabled = !m_enabled;
-        Q_EMIT toggled(m_enabled);
-    }
-
-Q_SIGNALS:
-    bool toggled(bool);
-private:
-    QString m_text;
-    QString m_toolTip;
-
-    bool m_isChecked = false;
-    bool m_isCheckable = false;
-    bool m_enabled = false;
-    bool m_checked = false;
-};
-
-#endif
-
 #endif