Remove redundant `virtual` specifier

src/gui/properties/downloadedpiecesbar.h

@@ -52,7 +52,7 @@ public:
 private:
     // scale bitfield vector to float vector
     QVector<float> bitfieldToFloatVector(const QBitArray &vecin, int reqSize);
-    virtual bool updateImage(QImage &image) override;
+    bool updateImage(QImage &image) override;
     QString simpleToolTipText() const override;
 
     // incomplete piece color

src/gui/properties/piecesbar.h

@@ -55,7 +55,7 @@ public:
     virtual void clear();
 
     // QObject interface
-    virtual bool event(QEvent *e) override;
+    bool event(QEvent *e) override;
 
 protected:
     // QWidget interface