Remove an accidentally committed test configuration

contrib/docker/docker-compose.yml

@@ -6,7 +6,7 @@ version: '3'
 services:
 
   synapse:
-    image: synapse #docker.io/matrixdotorg/synapse:latest
+    image: docker.io/matrixdotorg/synapse:latest
     # Since snyapse does not retry to connect to the database, restart upon
     # failure
     restart: unless-stopped