Remove this formula comment. #NOTE

raycaster.cpp

@@ -78,11 +78,6 @@ void Raycaster::sprite_casting(sf::RenderTarget &target) {
     double sprite_x = double(sprite_pos.location.x) - $pos_x + 0.5;
     double sprite_y = double(sprite_pos.location.y) - $pos_y + 0.5;
 
-    //transform sprite with the inverse camera matrix
-    // [ $plane_x   $dir_x ] -1                                       [ $dir_y      -$dir_x ]
-    // [               ]       =  1/($plane_x*$dir_y-$dir_x*$plane_y) *   [                 ]
-    // [ $plane_y   $dir_y ]                                          [ -$plane_y  $plane_x ]
-
     double inv_det = 1.0 / ($plane_x * $dir_y - $dir_x * $plane_y); // required for correct matrix multiplication
 
     double transform_x = inv_det * ($dir_y * sprite_x - $dir_x * sprite_y);