chore(complement): Remove workflow

docs/development/testing.mdx

@@ -4,7 +4,7 @@
 
 Have a look at [Complement's repository][complement] for an explanation of what
 it is. Continuwuity runs Complement manually; it is not part of the normal test
-suite or default CI gate.
+suite.
 
 ### Run it locally
 
@@ -52,15 +52,5 @@ passes. Compare a manual run with it when working on a compliance fix:
 git diff -- tests/test_results/complement/test_results.jsonl
 ```
 
-### Run it in CI
-
-Add the `Testing/Complement` label to a pull request to run the suite in
-Forgejo Actions. The workflow builds the image from the pull request, checks
-out upstream Complement, and uploads the full logs and result summary as an
-artifact. It passes only when the summary matches the checked-in baseline, so
-expected existing failures do not hide regressions.
-
-You can also start the workflow manually from the Actions page.
-
 [complement]: https://github.com/matrix-org/complement
 [complement-fork]: https://forgejo.ellis.link/continuwuation/complement