Revert "Add optional explicit ip config for smoke tests"

This reverts commit afcd2fc131.

src/test/smoketest/http-client.env.json

@@ -3,10 +3,5 @@
     "host": "localhost:8080",
     "username": "username",
     "password": "password"
-  },
-  "explicit-ip": {
-    "host": "0.0.0.0:8080",
-    "username": "username",
-    "password": "password"
   }
 }