bitbake: toaster: remove unnecessary white space

There was too much white space above the first
heading in the all builds page. This patch removes
the class that was adding the extra space.

(Bitbake rev: c9b20009c5e161987a143b00ee22218a4c9c0692)

Signed-off-by: Belen Barros Pena <belen.barros.pena@intel.com>
Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastergui/templates/mrb_section.html

@@ -5,7 +5,7 @@
 
 {%if mru.count > 0%}
 
-  <div class="page-header top-air">
+  <div class="page-header">
       <h1>
           Latest builds
        </h1>