Remove two Dentons proxies (#316)

Author: dalvizu

Sources/Hedera/Client/Network+Config.swift

@@ -58,7 +58,7 @@ extension Network.Config {
         15: ["3.121.238.26", "35.228.11.53"],
         16: ["18.157.223.230", "34.91.181.183"],
         17: ["18.232.251.19", "34.86.212.247"],
-        18: ["139.162.156.222", "141.94.175.187", "172.104.150.132", "172.105.247.67"],
+        18: ["141.94.175.187", "172.105.247.67"],
         19: ["13.244.166.210", "13.246.51.42", "18.168.4.59", "34.89.87.138"],
         20: ["34.82.78.255", "52.39.162.216"],
         21: ["13.36.123.209", "34.76.140.109"],