Encountered a MongoDB warning after converting a replica set to stand alone server

Question

I encountered the following warning after converting a mongodb replica set to a stand alone server. I did rs.remove(\'host\') and removed the replSet arguments when starting

Answer 1

The local database contains replica set information among other things. You can drop the local database without ill effect.
Use the following comments to drop the local database.

use local
db.dropDatabase()

The warning messages should go away after restarting mongod

Answer 2

use local;
db.dropDatabase();
db.system.replset.remove ({});

Quit the mongo shell .. restart service just in case "service mongod restart"

mongo --host bind_ip --port bind_port