Use default bugreport template in koschei.stg

roles/koschei/frontend/templates/config-frontend.cfg.j2

@@ -95,6 +95,7 @@ config = {
     ],
     "bugreport": {
         "url": "https://{{ koschei_bugzilla }}/enter_bug.cgi?{query}",
+        {% if env != 'staging' %}
         "template": {
             "product": "Fedora",
             "component": "{name}",
@@ -115,6 +116,7 @@ config = {
             This package is tracked by Koschei. See:
             {{ koschei_topurl }}/package/{name}"""
         },
+        {% endif %}
     },
 }