Remove the LHC video since we can't find attribution (#551)

Gemini claims it's from the "CERN 360" project (often called the "CERN
Street View"), which was a collaboration between Google Arts & Culture
and CERN but I couldn't find any trace of it. I did find this:
https://europe.googleblog.com/2013/09/street-view-arrives-at-cern.html
but it's street view stills only.

I like this video because it's dynamic, going down the LHC tunnel at a
quick pace, and because being in a tunnel with stuff close by they go
past the camera quicky. CERN has other 360 videos but none of them are
as dynamic. There's this one https://www.youtube.com/watch?v=NBrVCBCEVfk
but it's only got a small slow portion in the tunnel.

Their license is here: https://copyright.web.cern.ch/

It's a little surprising how few 360 videos there are. There's even less
180 stereoscopic videos except for adult content.

* #550

Author: greggman

public/assets/video/pano.webm

@@ -16,11 +16,7 @@ const videos = {
     url: '../../assets/video/5214261-hd_1920_1080_25fps.mp4',
     mode: 'cover',
   },
-  'lhc (360)': {
-    url: '../../assets/video/pano.webm',
-    mode: '360',
-  },
-  'lake (360)': {
+  'lake (360, drag to aim)': {
     url: '../../assets/video/Video_360°._Timelapse._Bled_Lake_in_Slovenia..webm.720p.vp9.webm',
     mode: '360',
   },

sample/videoUploading/main.ts

@@ -3,7 +3,6 @@ export default {
   description: `\
 This example shows how to upload video frame to WebGPU.
 giraffe by [Taryn Elliott](https://www.pexels.com/video/giraffe-walking-in-the-forest-5214261/).
-lhc by [unknown](https://foo.com).
 lake by [Fabio Casati](https://commons.wikimedia.org/wiki/File:Video_360%C2%B0._Timelapse._Bled_Lake_in_Slovenia..webm), [CC BY 3.0](https://creativecommons.org/licenses/by/3.0)
 `,
   filename: __DIRNAME__,