The DELETE command deletes either a global DEFINE symbol or a
    local DEFINE symbol. A global DEFINE symbol is defined with the
    DEFINE command without the /LOCAL qualifier. A local DEFINE
    symbol is defined in a debugger command procedure with the
    DEFINE/LOCAL command, so that its definition is confined to that
    command procedure.

    Related commands:

       DECLARE
       DEFINE
       SHOW DEFINE
       SHOW SYMBOL/DEFINED