Remove cubic interpolation.

pagure/templates/user_info.html

@@ -63,7 +63,7 @@
             <h2>Contributions</h2>
         </header>
         <a href="{{config.get('DATAGREPPER_URL')}}/raw?category={{config.get('DATAGREPPER_CATEGORY', 'pagure')}}&user={{username}}" target="_blank">
-          <img src="{{config.get('DATAGREPPER_URL')}}/charts/line?category={{config.get('DATAGREPPER_CATEGORY', 'pagure')}}&user={{username}}&split_on=users&delta=31536000&N=12&title=&width=600&height=200&style=light&fill=True&interpolation=cubic" alt="User activity graph"/>
+          <img src="{{config.get('DATAGREPPER_URL')}}/charts/line?category={{config.get('DATAGREPPER_CATEGORY', 'pagure')}}&user={{username}}&split_on=users&delta=31536000&N=12&title=&width=600&height=200&style=light&fill=True" alt="User activity graph"/>
         </a>
     </section>
     {% endif %}