Vivaldi is not open-source (#1404)

OSS part is just chromium, Frontend is at most source-available
They even note it's not OSS in their website
https://help.vivaldi.com/desktop/privacy/is-vivaldi-open-source/

README.md

@@ -843,7 +843,7 @@ Any comments, suggestions? [Let us know!](https://github.com/jaywcjlove/awesome-
 * [Station](https://getstation.com/) - An open-source browser providing a single place for all of your web applications. [![Open-Source Software][OSS Icon]](https://github.com/getstation/desktop-app/) ![Freeware][Freeware Icon]
 * [Tor Browser](https://www.torproject.org/projects/torbrowser.html) - Anonymity Online. Protect your privacy. Defend against network surveillance and traffic analysis. [![Open-Source Software][OSS Icon] ![Freeware][Freeware Icon]](https://gitlab.torproject.org/tpo/applications/tor-browser/)
   * [Mullvad Browser](https://mullvad.net/en/download/browser/) - Tor Browser without the network integrations, aimed at providing anti-fingerprinting browser technologies to VPN users, though it does not require Mullvad VPN. [![Open-Source Software][OSS Icon] ![Freeware][Freeware Icon]](https://gitlab.torproject.org/tpo/applications/mullvad-browser/)
-* [Vivaldi](https://vivaldi.com) - The browser that puts you in control. [![Open-Source Software][OSS Icon]](https://vivaldi.com/source) ![Freeware][Freeware Icon]
+* [Vivaldi](https://vivaldi.com) - The browser that puts you in control. ![Freeware][Freeware Icon]
 * [Yandex](https://browser.yandex.com/) - The quick and secure browser from Yandex for computers. ![Freeware][Freeware Icon]
 
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