revert cache issue

CHANGELOG

@@ -12,6 +12,9 @@ v 7.14.0 (unreleased)
   - Add support for destroying project milestones (Stan Hu)
   - Add fetch command to the MR page.
 
+v 7.13.1
+  - Revert issue caching
+
 v 7.13.0 (unreleased)
   - Remove repository graph log to fix slow cache updates after push event (Stan Hu)
   - Only enable HSTS header for HTTPS and port 443 (Stan Hu)

app/views/projects/issues/_issue.html.haml

@@ -3,7 +3,6 @@
     .issue-check
       = check_box_tag dom_id(issue,"selected"), nil, false, 'data-id' => issue.id, class: "selected_issue"
 
-  = cache issue do
   .issue-title
     %span.issue-title-text
       = link_to_gfm issue.title, issue_path(issue), class: "row_title"