Revert "Do not send consent notices if "no-consent-required" is set"

This reverts commit 27a686e53b8ba3f2e2f102fae73e598c00ec0086.

synapse/server_notices/consent_server_notices.py

@@ -80,10 +80,6 @@ class ConsentServerNotices(object):
         try:
             u = yield self._store.get_user_by_id(user_id)
 
-            if u["consent_version"] == "no-consent-required":
-                # user is exempt
-                return
-
             if u["is_guest"] and not self._send_to_guests:
                 # don't send to guests
                 return