remove public video conferencing config to avoid confusion

server/tinode.conf

@@ -618,20 +618,7 @@
 			}
 		],
 		// An alternative way to provide STUN/TURN configuration.
-		"ice_servers_file": "/path/to/ice-servers-config.json",
-
-		// Video conferencing configuration.
-		"vc": {
-			"enabled": true,
-			// Media server endpoint url.
-			"endpoint_url": "ws://localhost:7880/",
-			// Media server API key.
-			"api_key": "devkey",
-			// Media server secret.
-			"api_secret": "secret",
-			// Maximum call duration in seconds (1800 seconds = 30 min).
-			"max_duration": 1800
-		}
+		"ice_servers_file": "/path/to/ice-servers-config.json"
 	},
 
 	// Cluster-mode configuration.