"Convert All Categories" likely should be removed

[foolswisdom]

"Convert All Categories" likely should be removed

Early feedback shows at least one person "Convert All Categories" making all of their categories disappear.
​http://comox.textdrive.com/pipermail/wp-testers/2007-September/005227.html

I don't understand the scenario where this button would often be used. I think maybe it would make a better plugin or something.

Maybe a stronger warning would help?

Convert All Should Go

(In [6225]) Lose Convert All Categories button. It is confusing people. Props foolswisdom. fixes #5058

(In [6226]) Lose Convert All Categories button. It is confusing people. Props foolswisdom. fixes #5058 for 2.3