doorcontrol: Simplify querystring handling using new querystring tag

doorcontrol/templates/doorcontrol/access_report.dj.html

@@ -10,7 +10,7 @@
       {% for report_name, report_url in report_types %}
         <li class="nav-item">
           <a class="nav-link{% if report_name == selected_report %} active{% endif %}"
-             href="{{ report_url }}?{{ query_params }}">{{ report_name }}</a>
+             href="{{ report_url }}{% querystring page=None %}">{{ report_name }}</a>
         </li>
       {% endfor %}
     </ul>

doorcontrol/views.py

@@ -98,11 +98,6 @@ class BaseAccessReport(
         context["selected_report"] = self._selected_report()
         context["items_per_page"] = self.get_paginate_by(None)
 
-        query_params = self.request.GET.copy()
-        if "page" in query_params:
-            query_params.pop("page")
-        context["query_params"] = query_params.urlencode()
-
         return context