Delete is a disabled command. The only way to delete characters on the mud is to delevel them to level 29 or lower and let them autodelete.

In Game Description

On WoT, it is not possible to delete characters. This is done to dissuade
people from stat-hunting for a given name, and avoid accidental character
deletions. After a certain amount of time, during which a character is
not played, a character will be automatically deleted. These times are:

Level     Time Before Auto-Delete If Not Logged On
-----     ----------------------------------------
  1       3 days
 2-4      7 days
 5-9      1 month
10-19     3 months
20-29     6 months
 30+      Never