Remove engine PRs link from team-windows triage (#162263)

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [ ] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

Co-authored-by: Chris Bracken <chris@bracken.jp>

docs/triage/README.md

@@ -322,7 +322,6 @@ PRs are reviewed weekly across the framework, packages, and engine repositories:
 
 - [Incoming issue list](https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3Ateam-windows%2Cfyi-windows+-label%3Atriaged-windows+no%3Aassignee+-label%3A%22will+need+additional+triage%22+sort%3Aupdated-asc)
 - [P0 list](https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3Ateam-windows+label%3AP0+sort%3Aupdated-asc)
-- [Windows PRs on the engine](https://github.com/flutter/engine/pulls?q=is%3Aopen+is%3Apr+label%3A%22affects%3A+desktop%22+label%3Aplatform-windows+sort%3Aupdated-asc)
 - [Windows PRs on the framework](https://github.com/flutter/flutter/pulls?q=is%3Aopen+is%3Apr+label%3A%22a%3A+desktop%22+label%3Aplatform-windows+sort%3Aupdated-asc)
 - [Windows PRs on packages](https://github.com/flutter/packages/pulls?q=is%3Aopen+is%3Apr+label%3Atriage-windows+sort%3Aupdated-asc)