Remove line break from layout.html

Removed unnecessary line break from layout template.

Author: salomegarnier

source/_templates/layout.html

@@ -27,8 +27,6 @@
           <div class="clearer"></div>
         </section>
 
-        <br>
-
         <div class="page__back-to-top-container">
           <a href="#top" class="page__back-to-top">Back to top</a>
         </div>