Delete obsolete Feature Policy vr and xr directives

[bershanskiy]

Summary

Delete Feature-Policy directives xr and vr which never shipped. Create redirects to xr-spatial-tracking which shipped instead of them.

Motivation

Cleanup.

Supporting details

See deleted page content, including BCD entry.

Related issues

mdn/browser-compat-data#13260

Metadata

• Adds a new document
• Rewrites (or significantly expands) a document
• Fixes a typo, bug, or other error

[github-actions]

Preview URLs

• https://pr10258.content.dev.mdn.mozit.cloud/en-US/docs/Web/HTTP/Headers/Feature-Policy

Flaws

URL: /en-US/docs/Web/HTTP/Headers/Feature-Policy
Title: Feature-Policy
on GitHub
Flaw count: 3

• macros:
  • /en-US/docs/Web/API/Navigator/requestMIDIAccess does not exist
• broken_links:
  • Can't resolve /en-US/docs/Web/API/Audio_Output_Devices_API
• bad_bcd_links:
  • no explanation!

External URLs

URL: /en-US/docs/Web/HTTP/Headers/Feature-Policy
Title: Feature-Policy
on GitHub

• https://chrome.google.com/webstore/detail/feature-policy-tester-dev/pchamnkhkeokbpahnocjaeednpbpacop (1 time)
• https://example.com (1 time)
• https://wicg.github.io/webusb/ (1 time)
• https://www.w3.org/TR/css-nav/ (1 time)

[Elchi3]

Perfect, thanks! 👍