Remove app from sale in iTunes Connect

It is not trivial.

1. Select your app

2. Click on Rights and Pricing

3. There is a link 'Unless you select specific stores, your app will be for sale in all App Stores worldwide.', click on the 'specific stores'

4. Deselect all locations

5. Save

Now, after removing the app form sale, you can remove it.

iTunes search with command f

To use Command-F to get to the search field in iTunes you have to execute the following in Terminal.

defaults write com.apple.iTunes NSUserKeyEquivalents -dict-add "Target Search Field" "@F"

You have to restart iTunes to make it work.