How to disable Background layer rendering?

I’ve done tracking of the footage, and I’ve setup the tracking scene.
As you probably know, once you setup the tracking scene, Blender automatically creates two “Render Layers” nodes in the compositor. One node is for the “Foreground” layer, as shown in attached screenshot, and the other is for the “Background” layer.
Also, Blender creates two collections in the outliner: foreground and background. Background consists only of “shadow catcher” plane.

The problem is, Blender is rendering separately those two layers / collections, which doubles my rendering time, and since I have very simple scene, that is in fact just a waste of time for me. I want to do all the rendering in a single pass.

I’ve tried deleting the background “render layers” node, and deleting the “background” collection, but still, when I try to render the scene, it always renders both foreground and background, although the background literally doesn’t exist anymore in my file. At least, I’m not aware of it.

I’m sure I’m missing some simple solution.
Help!