remove unused variables

Change-Id: Ia94a501fa2571752286df0451a0a8a2b303a10c8

chart2/source/view/charttypes/GL3DBarChart.cxx

@@ -312,7 +312,6 @@ void GL3DBarChart::clickedAt(const Point& /*rPos*/, sal_uInt16 nButtons)
     const BarInformation& rBarInfo = itr->second;
     mnStepsTotal = 100;
     mnStep = 0;
-    maOldCameraDirection = maCameraDirection;
     maCameraDirection = rBarInfo.maPos;
     render();
 

chart2/source/view/inc/GL3DBarChart.hxx

@@ -77,9 +77,6 @@ private:
     glm::vec3 maCameraPosition;
     glm::vec3 maCameraDirection;
 
-    glm::vec3 maOldCameraPosition;
-    glm::vec3 maOldCameraDirection;
-
     Timer maTimer;
     glm::vec3 maStep;
     size_t mnStep;