Fix test failure

[vincentarelbundock]

Useless PR just to trigger tests on main

[vincentarelbundock]

I'm going to merge this now, since this is such a minor change. We are wrapping a call to dir_delete() that is used to clean-up after the test in a try. The dir_delete() call errored on a hard to diagnose error related to temporary directories and testthat environment.

Frankly, I doubt this will bite us. It might at CRAN release time (unlikely, I think), but we can cross that bridge when we get to it.