urlator's questions

I have used aws-vault add production to create a temporary credentials. Because there is no production named profile in .aws/credentials I decided to remove the credentials and configure a new one, with corrected name. For that I used aws-vault remove production. That of course only deleted the credentials, but not the profile name shown in the aws-vault list command output. Is there a way to delete that profile name?

Thanks in advance.

If we have example.com we would setup things something like this:

$ORIGIN example.com.
@  1D  IN  SOA ns1.example.com. hostmaster.example.com. (
                  2002022401 ; serial
                  3H ; refresh
                  15 ; retry
                  1w ; expire
                  3h ; nxdomain ttl
                 )
          IN  NS     ns1.example.com.
          IN  NS     ns2.example.com.

since in the parent zone .com. there is already NS record for the example.com. child zone and A glue record for the ns1.example.com. for what purpose do we state NS records again in the child zone?

and also, do we need to state A record for the name servers in the child zone itself?