remove useless HTML in multiselection modal

Former-commit-id: 608013856d919c051ce9d6e7108ad70a8bad94ad

ippisite/ippidb/templates/multiselection_modal.html

@@ -8,7 +8,6 @@
         </button>
       </div>
       <div class="modal-body">
-  <fieldset class="form-group row border border-info m-2">
     <div class="bg-info col-12">
         <legend>{{ label }}
             {% if not all_param_value %}
@@ -36,7 +35,6 @@
       </label>
     </div>
     {% endfor %}
-  </fieldset>
       </div>
       <div class="modal-footer">
         <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>