Author: Eloy Lafuente (stronk7)
MDL-32709 book: delete some not needed stuff
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9717aa2ddd552566a3f76a26c9eaeb2e8533663f
http://github.com/moodle/moodle/commit/9717aa2ddd552566a3f76a26c9eaeb2e8533663f
- 2.3 en [missingfilemanagement,book]