Revert "Log book navigation clicks to google analytics"

This reverts commit 7068566f1f713d678d7b757f4848ed2afc3d866b.

Conflicts:
	wp-content/themes/lsb-boksok.no-theme/assets/js/_main.js
Revert "Added book navigation custom fields and template."

This reverts commit fa66acbeb20c6640c881e49dc51fc6f6ae044772.
Revert "Moved search field to header"

This reverts commit db67d8412ae55a2b3ff361c0b73c6f08a3f3eb80.