Chore: macro deprecation: WebRTCSidebar should be removed

[wbamberg]

I'm currently working on removing custom sidebars from the Web/API docs. There's more context at https://discourse.mozilla.org/t/defaultapisidebar-apiref-and-groupdata/40210/24.

In mdn/content#22486 I removed references to WebRTCSidebar.ejs from en-US content, and in mdn/yari#7674 I'm asking for it to be deprecated.

[yin1999]

Thanks @wbamberg, I've add labels for all the locales which has used this macro, and created #10191 for remove this from l10n-zh.

[Graywolf9]

Thank you so much @wbamberg !

A little doubt, this is change {{WebRTCSidebar}} by {{DefaultAPISidebar("WebRTC")}}?

[wbamberg]

A little doubt, this is change {{WebRTCSidebar}} by {{DefaultAPISidebar("WebRTC")}}?

For pages under /web/api/webrtc_api/ yes. For all other pages, replace {{WebRTCSidebar}} with {{APIRef("WebRTC")}}.

But please feel free to tag me in your PR and I'll have a look :).

[Graywolf9]

Taking care of it in #10326 for es

Thank you @wbamberg !

[wbamberg]

-> mdn/yari#8012 🎉 ! Thanks everyone :).