Remove text in man page that says the program can also be used for
generate TSIG keys, this was removed in 9.13.0 but this text was still
not yet removed.
~~~~~~~~~~~
:program:`dnssec-keygen` generates keys for DNSSEC (Secure DNS), as defined in
-:rfc:`2535` and :rfc:`4034`. It can also generate keys for use with TSIG
-(Transaction Signatures) as defined in :rfc:`2845`, or TKEY (Transaction
-Key) as defined in :rfc:`2930`.
+:rfc:`2535` and :rfc:`4034`.
The ``name`` of the key is specified on the command line. For DNSSEC
keys, this must match the name of the zone for which the key is being