Remove CI for this implementation stage

Author: cotti

.github/workflows/preview-build.yml

@@ -181,9 +181,6 @@ jobs:
         if: env.MATCH == 'true' && (github.repository == 'elastic/docs-builder' && steps.deployment.outputs.result)
         uses: elastic/docs-builder/.github/actions/bootstrap@main
 
-      - name: Validate Redirect Health
-        uses: elastic/docs-builder/actions/validate-redirects-health@main
-
       # we run our artifact directly, please use the prebuild
       # elastic/docs-builder@main GitHub Action for all other repositories!
       - name: Build documentation