Remove card styling from job advert -- md doesn't automatically reflow the text

advert.md

@@ -3,9 +3,7 @@ title: Job Announcements
 menu_order: 4
 ---
 
-<div class="card card-block">
-
-<h4 class="card-title"> Two new postdoc positions at Imperial! </h4> 
+<h4> Two new postdoc positions at Imperial! </h4> 
 
 We are seeking two outstanding postdocs (one theory, one practice) with
 interests in the formal specification and verification of concurrent
@@ -33,5 +31,3 @@ such as databases, file systems and data centres.
 Please see the project web page for more details, and do not
 hesitate to contact us if you are interested in one of these postdoc
 positions.
-
-</div>