Scaladoc - remove test deployment from CI (#19011)

`https://scala3doc.virtuslab.com` environment was rarely used and it was
removed from Azure - this PR removes it from CI

Author: Florian3k

.github/workflows/scaladoc.yaml

@@ -62,21 +62,6 @@ jobs:
       - name: Generate documentation for example project using dotty-sbt
         run: ./project/scripts/sbt "sbt-test/scripted sbt-dotty/scaladoc"
 
-      - name: Generate index file
-        run: scaladoc/scripts/mk-index.sh scaladoc/output > scaladoc/output/index.html
-
-      - name: Upload documentation to server
-        uses: azure/CLI@v1
-        if: env.AZURE_STORAGE_SAS_TOKEN
-        env:
-          PR_NUMBER: ${{ github.event.pull_request.number }}
-        with:
-          inlineScript: |
-            DOC_DEST=$(echo pr-${PR_NUMBER:-${GITHUB_REF##*/}} | tr -d -c "[-A-Za-z0-9]")
-            echo uplading docs to https://scala3doc.virtuslab.com/$DOC_DEST
-            az storage container create --name $DOC_DEST --account-name scala3docstorage --public-access container
-            az storage blob upload-batch --overwrite true -s scaladoc/output -d $DOC_DEST --account-name scala3docstorage
-
   stdlib-sourcelinks-test:
     runs-on: ubuntu-latest
     # if false - disable flaky test