Try and fix the qa redirect

ugh, it's hard to understand this stuff.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

playbooks/include/proxies-redirects.yml

@@ -399,15 +399,7 @@
   - role: httpd/redirect
     shortname: qa
     website: qa.fedoraproject.org
-    target: https://fedoraproject.org/wiki/QA
-    when: env != 'staging'
-    tags:
-    - qa
-
-  - role: httpd/redirect
-    shortname: qa-stg
-    website: qa.stg.fedoraproject.org
-    target: https://stg.fedoraproject.org/wiki/QA
+    target: https://{{env_prefix}}fedoraproject.org/wiki/QA
     when: env == 'staging'
     tags:
     - qa