How To Disable VSCode Git Rebase UI

How do I disable VS Code's Interactive Rebase UI?

I'm hoping to return to the previous experience where running git rebase -i opens a text file into VS Code.

According to this issue, this is actually caused by the GitLens extension, not VSCode. You can fix it by adding this to your settings.json:

"workbench.editorAssociations": {
  "git-rebase-todo": "default"
}