Removes caches that cause CSRF token failures

bookwyrm/templates/snippets/shelve_button/shelve_button.html

@@ -1,10 +1,7 @@
 {% load bookwyrm_tags %}
 {% load utilities %}
-{% load cache %}
 
 {% if request.user.is_authenticated %}
-{# 6 month cache #}
-{% cache 15552000 shelve_button request.user.id book.id %}
 
 {% with book.id|uuid as uuid %}
 {% active_shelf book as active_shelf %}
@@ -35,5 +32,4 @@
 {% include 'snippets/reading_modals/progress_update_modal.html' with book=active_shelf.book id=modal_id readthrough=readthrough class="" %}
 
 {% endwith %}
-{% endcache %}
 {% endif %}