Remove docs and generate changelog

Remove related docs for warnings
on pipeline view. And generate changelog.

changelogs/unreleased/remove-pipeline-warnings-from-pipeline-view.yml

+---
+title: Remove pipeline warnings from pipeline view
+merge_request: 41419
+author:
+type: changed

doc/ci/troubleshooting.md

@@ -11,7 +11,6 @@ type: reference
 
 Pipeline configuration warnings are shown when you:
 
-- [View pipeline details](pipelines/index.md#view-pipelines).
 - [Validate configuration with the CI Lint tool](yaml/README.md#validate-the-gitlab-ciyml).
 - [Manually run a pipeline](pipelines/index.md#run-a-pipeline-manually).