Profiler: Use = default for empty destructor

Userland/DevTools/Profiler/FlameGraphView.cpp

@@ -49,10 +49,6 @@ FlameGraphView::FlameGraphView(GUI::Model& model, int text_column, int width_col
     layout_bars();
 }
 
-FlameGraphView::~FlameGraphView()
-{
-}
-
 GUI::ModelIndex const FlameGraphView::hovered_index() const
 {
     if (!m_hovered_bar)

Userland/DevTools/Profiler/FlameGraphView.h

@@ -21,7 +21,7 @@ class FlameGraphView final : public GUI::Widget
     C_OBJECT(FlameGraphView);
 
 public:
-    virtual ~FlameGraphView() override;
+    virtual ~FlameGraphView() override = default;
 
     Function<void()> on_hover_change;