_form.html.erb in thredded-0.12.0

- old
+ new

@@ -1,8 +1,6 @@
 <%# TODO: For private topics, only autocomplete users in this private topic %>
 <%= render 'thredded/posts_common/form',
-           topic: topic,
            post: post,
-           preview_url: preview_url,
            button_text: t('thredded.private_posts.form.create_btn'),
            button_submitting_text: t('thredded.private_posts.form.create_btn_submitting'),
            content_label: t('thredded.private_posts.form.content_label') %>