Remove default style choice from CustomImportOrder

[Laurens-W]

What's changed?

Removed the default selection of Checkstyle::customImportOrderStyle

What's your motivation?

This recipe is currently changing imports even on projects that do not use Checkstyle

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files

[Laurens-W]

Should we add a regression test that verifies nothing is changed even when the imports are in an unexpected order?
Feels weird that all the tests still succeed after removing the default style

[github-actions]

Some suggestions could not be made:

• src/main/java/org/openrewrite/staticanalysis/CustomImportOrder.java
  • lines 24-24

[pstreef]

Should we add a regression test that verifies nothing is changed even when the imports are in an unexpected order? Feels weird that all the tests still succeed after removing the default style

yes, that would be good. From this alone I'm not confident this will solve the reported issue.