[amibroker] Cleanup Australian database.

[alan4171]

I have converted my Metastock data to an Amibroker database.
I want to remove all the warrants. i.e. all 6 letter codes.
How do I do this automatically? It's obviously too tedious and time
consuming to do it manually.
Hopefully there is some built-in feature that I've missed !!
Thanks.
Alan