Remove update_url workaround which was added for https://productforums.google.com/forum/#!topic/chrome/kGgLwnrDKpQ.
Remove update_url workaround which was added for https://productforums.google.com/forum/#!topic/chrome/kGgLwnrDKpQ.

The Chrome Web Store rejects manifests with this field.

google/chrome-ssh-agent,google/chrome-ssh-agent,google/chrome-ssh-agent,google/chrome-ssh-agent