remove 'a' keyboard shorcut from help page until it get's fixed

Author: Lupul

web/templates/footer.html

@@ -11,7 +11,6 @@
 
     </div>
     <ul>
-      <li><span class="key">a</span><?=__('Add New object')?></li>
       <li><span class="key">Ctrl + Enter</span><?=__('Save Form')?></li>
       <li><span class="key">Ctrl + Backspace</span><?=__('Cancel saving form')?></li>