Removed forgotten debug stuff from the "shader" example

examples/shader/Shader.cpp

@@ -162,9 +162,6 @@ int main()
                       "Press numpad 2/5 to change the flower shader\n"
                       "Press numpad 3/6 to change the global shader");
 
-sf::RenderImage test;
-test.Create(800, 600);
-
     // Create a clock to measure the total time elapsed
     sf::Clock clock;