Easiest way might be removing the string in conf/msg_conf/map_msg.conf but it might show empty line (not sure?).
You might want to try removing then @reloadmsgconf, if it shows empty line imma try take a look in src.
Oops, just found out you have to edit the src anyway. In atcommand.c line 8812:
if ( atcmd_binding_count ) {
int i, count_bind, gm_lvl = pc_get_group_level(sd);
for( i = count_bind = 0; i < atcmd_binding_count; i++ ) {
if ( gm_lvl >= ( (type - 1) ? atcmd_binding[i]->level2 : atcmd_binding[i]->level ) ) {
unsigned int slen = strlen(atcmd_binding[i]->command);
if ( count_bind == 0 ) {
cur = line_buff;
memset(line_buff,' ',CHATBOX_SIZE);
line_buff[CHATBOX_SIZE-1] = 0;
clif_displaymessage(fd, "-----------------");
clif_displaymessage(fd, msg_txt(sd,509)); // Script-bound commands:
}
if (slen + cur - line_buff >= CHATBOX_SIZE) {
clif_displaymessage(fd,line_buff);
cur = line_buff;
memset(line_buff,' ',CHATBOX_SIZE);
line_buff[CHATBOX_SIZE-1] = 0;
}
memcpy(cur,atcmd_binding[i]->command,slen);
cur += slen+(10-slen%10);
count_bind++;
}
}
if ( count_bind )
clif_displaymessage(fd,line_buff);// last one
count += count_bind;
}
Removing this whole block > clean > recompile.
Let me know if you encounter any issue.