How to get rid off custom cropping presets in Lightroom ?

Correction - I didn't mean to cause any confusion. Unfortunately you can't include aspect ratio (or crop) in a Develop preset (I don't know why not). Nor, I think, in a processing default.

I did suggest that as a feature request on the Adobe forum - somehow that has since made it seem like a real thing to me! My apologies.

About all you can do, other than work manually from the present history-list of previously entered proportions and named items, is to keep a template image and Sync (or copy-paste) that onto other images. This method might help if (for example) your viewfinder shows less than the full frame, and you wanted to replicate with a non-destructive crop the view you ACTUALLY SAW. In this case aspect ratio is not the issue - you would want a specific crop that was suitably smaller than both the width and the height of the full as-shot frame.

If these things were possible in a develop preset there'd be no difficulty selecting that during import. I have since for other reasons bought a camera with a 100% viewfinder so this particular issue has gone away for me.

RP (blush)