removeUnusedImports does nothing

I have a [demo project](https://github.com/spartanhooah/smartbar-backoffice) that I've recently started. I generated some stubs from the OpenAPI spec using the Gradle plugin for that, and the code had some unused imports. I have configured Spotless to remove unused imports [here](https://github.com/spartanhooah/smartbar-backoffice/blob/master/build.gradle.kts#L48), but it's not happening. I don't see any errors when I run `spotlessApply`, and if I add the `--info` flag I don't see any mention of import in the output.

Project details:
Gradle wrapper 8.14
Spotless plugin version 7.2.1
Default version of `palantirJavaFormat`