If you try and remap all your Delete keys to, let’s say “X” (Hello Blender habbit), you will still not be able to delete stuff in content browser. It will stick to “Backspace”. Why? Because by default, when you hit any character key in Content Browser, you will start searching automatically and there’s no way to turn that feature off.
It would be a quality of life improvement for me if I could turn that automatic searching off and activate it only after hitting Ctrl+F, cause now I have “X” to delete everywhere but the content browser, where’s it’s still the good-ol Backspace.