gnupg: GPGSM DELETE

 
 5.6.9 Delete certificates
 -------------------------
 
 To delete a certificate the command
 
        DELKEYS PATTERN
 
    is used.  To allow multiple patterns (which are ORed) quoting is
 required: Spaces are to be translated into "+" or into "%20"; in turn
 this requires that the usual escape quoting rules are done.
 
    The certificates must be specified unambiguously otherwise an error
 is returned.