Don't bother storing client IPs

Since requests proxy via hungry the IP is masked already. Responsibility
for tracking this is no longer with synapse.

synapse/api/auth/internal.py

@@ -115,7 +115,10 @@ async def _wrapped_get_user_by_req(
         Once get_user_by_req has set up the opentracing span, this does the actual work.
         """
         try:
-            ip_addr = request.get_client_ip_if_available()
+            # Beep: don't care about client IPs in synapse since hungry proxies (so IP is hungry)
+            ip_addr = ""
+            # ip_addr = request.get_client_ip_if_available()
+
             user_agent = get_request_user_agent(request)
 
             access_token = self.get_access_token_from_request(request)