Remove print messages

src/render/Render_alternate.cpp

@@ -375,7 +375,6 @@ void  Render_alternate::paintGL(){
     //select shader program
     glUseProgram(_shader->getProgramID());
     checkGlError();
-    std::cout << "paintGL" << std::endl;
     glm::mat4 tmp  = _modelview;
     glm::mat4 tmp2 = _modelview;
     glm::mat4 mvp;