diff --git a/app/abstractinterface.cpp b/app/abstractinterface.cpp
deleted file mode 100644
index 3153160b7..000000000
--- a/app/abstractinterface.cpp
+++ /dev/null
@@ -1,42 +0,0 @@
-#include "abstractinterface.h"
-
-#include <QObject>
-#include <QQuickWindow>
-
-namespace NowDock {
-
-AbstractInterface::AbstractInterface(QQuickWindow *dock) :
-    QObject(dock),
-    m_isDockWindowType(false),
-    m_dockNumber(0)
-{
-    m_dockWindow = dock;
-}
-
-void AbstractInterface::setDockNumber(unsigned int no)
-{
-    if (m_dockNumber == no) {
-        return;
-    }
-    
-    m_dockNumber = no;
-    
-    emit dockNumberChanged(m_dockNumber);
-}
-
-unsigned int AbstractInterface::dockNumber() const
-{
-    return m_dockNumber;
-}
-
-
-void AbstractInterface::setMaskArea(QRect area)
-{
-    if (m_maskArea == area) {
-        return;
-    }
-    
-    m_maskArea = area;
-}
-
-}
diff --git a/app/abstractinterface.h b/app/abstractinterface.h
deleted file mode 100644
index df2b30d7b..000000000
--- a/app/abstractinterface.h
+++ /dev/null
@@ -1,56 +0,0 @@
-#ifndef ABSTRACTINTERFACE_H
-#define ABSTRACTINTERFACE_H
-
-#include <QObject>
-#include <QQuickWindow>
-
-namespace NowDock {
-
-class AbstractInterface : public QObject {
-    Q_OBJECT
-    
-public:
-    explicit AbstractInterface(QQuickWindow *dock);
-    
-    virtual bool activeIsDialog() const = 0;
-    virtual bool activeIsMaximized() const = 0;
-    virtual bool desktopIsActive() const = 0;
-    virtual bool dockIntersectsActiveWindow() const = 0;
-    virtual bool dockIsCovered(bool totally = false) const = 0;
-    virtual bool dockIsCovering() const = 0;
-    virtual bool dockIsOnTop() const = 0;
-    virtual bool dockInNormalState() const = 0;
-    virtual bool dockIsBelow() const = 0;
-    
-    //FIXME: This may not be needed, it would be better to investigate in KWindowSystem
-    //its behavior when setting the window type to NET::Dock
-    virtual void setDockDefaultFlags(bool dock = false) = 0;
-    virtual void setDockToAllDesktops() = 0;
-    virtual void showDockAsNormal() = 0;
-    virtual void showDockOnBottom() = 0;
-    virtual void showDockOnTop() = 0;
-    
-    void setDockNumber(unsigned int no);
-    unsigned int dockNumber() const;
-    
-    void setMaskArea(QRect area);
-    
-Q_SIGNALS:
-    void activeWindowChanged();
-    void dockNumberChanged(unsigned int no);
-    void windowInAttention(bool);
-    //FIXME: there is a chance that this signal is not needed at all
-    void windowChanged();
-    
-protected:
-    bool m_isDockWindowType;
-    int m_dockNumber;
-    
-    QRect m_maskArea;
-    
-    QQuickWindow *m_dockWindow;
-};
-
-}
-
-#endif