NAME
        DeleteNV -- remove an entry from nonvoltatile storage. (V40)

   SYNOPSIS
        success = DeleteNV(appName, itemName, killRequesters);
        D0                 A0       A1        D1

        bool deletenv(strptr, strptr, bool);

   FUNCTION
        Searches the nonvolatile storage for the indicated entry and removes
        it.

        The strings appName and itemName may not contain the '/' or ':'
        characters. It is recommended that these characters be blocked
        from user input when requesting AppName and ItemName strings.

   INPUTS
        appName - NULL terminated string identifing the application that
                  created the data. Maximum length is 31.
        ItemName - NULL terminated string uniquely identifing the data
                   within the application. Maximum length is 31.
        killRequesters - suppress system requesters flag. TRUE if all system
                         requesters are to be suppressed during this function.
                         FALSE if system requesters are allowed.

   RESULT
        success - TRUE will be returned if the entry is found and deleted.
                  If the entry is not found, FALSE will be returned.