How to remove a build from itunes connect?

Wait! You can expire a build actually! :)

After 2017 Solution:

Still same at 2021

1. From the homepage, click My Apps, select your app.

2. Click the TestFlight tab.

3. In the sidebar, below Builds, click the platform (iOS or tvOS).

4. In the table on the right, in the Build column, click the app icon or build string for the build that is missing compliance information.

5.Click Expire Build.

Ta-da! Build expired at the App Store Connect.

Means:

• Internal testers and external testers will no longer be able to install this build.
• You can remove a build from being the current build
• But, You cannot delete it from App Store Connect (iTunes Connect)

Required roles

• Account Holder
• Admin
• App Manager

See Role permissions.

For more information please visit.

UPDATE:

Time has changed, you can now remove (expire) TestFlight Builds as in this answer but you still cannot delete the build.

OLD:

I asked apple and here is their answer:

I understand you would like to remove a build from iTunes Connect as shown in your screenshot.

Please be advised this is expected behavior as you can remove a build from being the current build but you cannot delete it from iTunes Connect. For more information, please refer to the iTunes Connect Developer Guide: https://developer.apple.com/library/content/documentation/LanguagesUtilities/Conceptual/iTunesConnect_Guide/

So i just can't.