Removed "hello world" message again

src/1.getting_started/1.1.hello_window/hello_window.cpp

@@ -12,7 +12,6 @@ const unsigned int SCR_HEIGHT = 600;
 
 int main()
 {
-	std::cout<<"Hello World"<<std::endl;
     // glfw: initialize and configure
     // ------------------------------
     glfwInit();