Removing Here be Dragons warning in latest in favor of Read The Doc's own warning

[mhilbrunner]

We have this warning on latest pages:

As of the new RTD changes, RTD now has their own version of this, a modal that pops up looking like this:

We can disable that, but we may actually want to instead remove our own version and go with this "native" one. Removing our version would improve search results, where currently, our warning is indexed:

Additionally, RTD's version will likely be better supported in the long term, and is also more lightweight.

[tetrapod00]

The native RTD version seems to be a popup that, once closed, does not reappear, even after switching docs versions to and from latest or navigating to another page. That makes our custom implementation more usable, IMO. Tested casually with Firefox, Edge, and Chrome on Windows 10.

Also, would the native popup have the same problem with covering content that the flyout menu does (see #10094)?

Overall I'm neutral. The RTD version is not clearly better in all cases, but it might be worth switching anyway for maintenance reasons.

[mhilbrunner]

Also, would the native popup have the same problem with covering content that the flyout menu does

It sadly does. Kinda solved by the above (it only appears once), but that does indeed have downsides.

[Piralein]

I would be in favor of the rtd implementation for future proof reasons, but yea it needs to cook a little bit longer.