Refactored syntax highlighting shortcodes into markdown

content/blog/miscellaneous/purge-postfix-queue-based-content.md

@@ -13,6 +13,6 @@ Sometimes a lot of spam can acacumulate in a postfix queue.
 ## The solution
 
 Here is a command that can search through queued emails for a certain character string (here XXX as an example) and delete the ones that contain it :
-{{< highlight sh >}}
+```sh
 find /var/spool/postfix/deferred/ -type f -exec grep -li 'XXX' '{}' \; | xargs -n1 basename | xargs -n1 postsuper -d
-{{< /highlight >}}
+```