How do I delete an extension in my Chrome developer dashboard?

You can't delete an extension from the Chrome developer dashboard.

In the past, there was a delete button at the dashboard, but it has been removed because developers accidentally removed apps/extensions (and then tried to re-upload the app/extension with the same ID, which failed).

Unpublished extensions/apps do not count toward the extension limit, so there are no consequences for having a lot of unpublished apps/extensions besides the clutter at the dashboard.

If you're really bothered by the entry at your dashboard, create a user style, user script or extension to hide it.

The new beta dashboard has an archive option. (more -> archive)

You can not delete an extension/APP from the developer dashboard of chrome web store.

Chrome web store have released new developers dashboard. You can Archive an extension/APP from the same.

It is possible that developers accidentally removed extensions/APP. Then using the same extension/APP id for publication is not possible. To handle these type of human mistakes its mandatory to first unpublish the extension/APP and then Archive the same.

Steps to Archive the extension/APP:

1. Open old developers dashboard:https://chrome.google.com/webstore/developer/dashboard
2. click on respective unpublish button of your extension
3. Open new developersdashboard: https://chrome.google.com/webstore/devconsole
4. Select your extension from the given list
5. Click on "MORE" (top right corner)
6. Select "Archive"
7. Done

Note: We do not have unpublish option in new developers dashboard. Because its still in beta phase. So for unpublish the extension, you can still use old dashboard.