Remove usages of book module from tests

No, core/modules/image/tests/src/Functional/ImageStylesPathAndUrlTest.php does not need to be changed.

Abhijith S → made their first commit to this issue’s fork.

I left a question in the MR.

I meant NR for another opinion

Left some comments but based on how we handled Tour removal we will need to use a test module vs another contrib. Which should also be used in the spot @quietone brought up a concern about lost coverage.

Feedback appears to be addressed

Issue credits

Committed to 11.x - thanks

larowlan → closed merge request !6170

Automatically closed - issue fixed for 2 weeks with no activity.