cannot split off a pure file removal change

[wmartinmimi]

Description

When attempting to move a file removal from a commit/working change to another commit, it fails.

Steps to Reproduce the Problem

1. mkdir test
2. cd test
3. jj git init
4. echo "test" > test
5. jj ci -m "new"
6. echo "testing" > test2
7. rm test
8. jj split
9. select only the file removal
10. fails

note that it also fails for jj squash -i

https://asciinema.org/a/aVeHtWjw2CO0X5V2DsMxwCZkp

Expected Behavior

The file removal change is moved to the desired commit

Actual Behavior

The file removal change remains in the original commit

Specifications

• Platform: wsl2 (arch linux)
• Version: 0.24 and 0.25, have not tested other versions

[martinvonz]

Sounds a lot like #3702