Removed an obselete constant

src/gui/widgets/timeline/timeline-layout-helper.cpp

@@ -36,9 +36,7 @@ using namespace util;
 namespace gui {
 namespace widgets {
 namespace timeline {
-  
-const int TimelineLayoutHelper::AnimationTimeout = 20; // 20ms
-  
+
 TimelineLayoutHelper::TimelineLayoutHelper(TimelineWidget &owner) :
   timelineWidget(owner),
   totalHeight(0),

src/gui/widgets/timeline/timeline-layout-helper.hpp

@@ -240,13 +240,6 @@ protected:
    * @see on_animation_tick()
    **/
   bool is_animating;
-  
-protected:
-  
-  /**
-   * The frequencey of animation timer ticks in milliseconds.
-   **/
-  static const int AnimationTimeout;
 };
 
 }   // namespace timeline