Here is what you can do to clean up the config:
configure snmpv3 delete user "initial"
configure snmpv3 delete user "initialmd5"
configure snmpv3 delete user "initialsha"
configure snmpv3 delete user "initialmd5Priv"
configure snmpv3 delete user admin
configure snmpv3 delete user initialshaPriv
configure snmpv3 delete community "private"
configure snmpv3 delete community "public"