Revert "conditionally adds nav links to textbook page"
Revert "conditionally adds nav links to textbook page"

This reverts commit cda678f41d9f4376ac46e4bb1d95a204f95a18ec.

uw-it-aca/myuw,uw-it-aca/myuw,uw-it-aca/myuw,uw-it-aca/myuw