app/views/pinboard_items/destroy.js.erb
$('[data-pin-button-item-id="<%= @pinboard_item.pinned_object_id -%>"]').replaceWith("<%= j pin_item_to_pinboard_link(@pinboard_item.pinned_object, sessions_current_user) -%>");
TW.workbench.pinboard.removeItem(<%= @pinboard_item.id -%>)
$('body').mx_spinner('hide');
TW.workbench.alert.create("Pinboard item was successfully destroyed.", "notice");