I’m an idiot, I imported 7000 contacts into Skype. I know, I should have just allowed things to be seen. There is no documented way to delete contact except one by one. The problem is that it is not clear how to select all contacts. Here is how you do it:
# Click on the contact group list.
# There is no command for this, you just have to know it is Command-A or Ctrl-A on the PC to select all the contacts. With 7000 contacts, it will take about 2 minutes.
# Then all the Edit menu items are greyed out so it appears that you are stuck. But in fact, if you hit the Delete Key, then you can delete all the contacts.
The main issue is that I’m a dummy and expect that everything that can be done with shortcut keys is on the menus so I was expecting to see both Edit/Select all which isn’t there and also Edit/Delete to be active instead of greyed. You are warned, don’t import contacts, just click on View Address Book.
Performance will be way better. With 7000 contacts, Skype is regularly spinning for 10 minutes at 100% talking with its servers. Right now the 7000 contact delete is still going on after five minutes with the processor running maxed.
Ctrl+A selects all your contacts and then just delete them