Remove auspice-client/customisations/splash.js

[victorlin]

nextstrain.org now uses its own dataset listing UI, so this file can probably be removed.

Tasks:

• /fetch URLs can still end up at the auspice splash page
• URLs containing "narrative" can still end up at the auspice splash page
• failure to GET /charon/getDataset can end up at the Auspice splash page
• remove the file once it can no longer be accessed

(some tasks from #310 (comment))

[tsibley]

I added another way to get to the Auspice splash page to the task list above, e.g.

[victorlin]

https://next.nextstrain.org/seasonal-flu/h3n2/ha/6m works for me. Something like https://next.nextstrain.org/seasonal-flu/h3n2/ha/1m serves a 404 page instead.

I tried a few other URLs and couldn't get this splash component to load. Does anyone have a URL that loads it?

[tsibley]

@victorlin I was showing an example of the way to get the splash page that I added to the task list at the top:

failure to GET /charon/getDataset can end up at the Auspice splash page

There's a lot of ways this can happen in real usage, but you can replicate it one way by:

1. Visit https://next.nextstrain.org/seasonal-flu/h3n2/ha/2y
2. Disconnect from the network (e.g. turn off wifi, unplug your ethernet, turn on airplane mode, ifconfig eth0 down, go into "offline mode" in your browser/dev tools, whatever)
3. Change sidebar dropdown dataset selector from 2y → 6m.
4. Watch splash page load because the /charon/getDataset request failed.

You can also use request blocking in browser dev tools to block the /charon/getDataset requests and see this behaviour.