ci: Remove impact-less message about using @tag.All (#34547)

This message goes in the PR description, and the immediate next step
happily overwrites it. People never get to see this message at all
(unless we check the description history, of course).

Removing it as we likely don't need this reminder anymore.




<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Chores**
- Removed outdated PR automation code related to test response tagging.


<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/pr-automation.yml

@@ -150,25 +150,6 @@ jobs:
         if: steps.checkAll.outputs.invalid_tags_all != ''
         run: exit 1
 
-      # In case of a run with all test cases, inform the PR author of better usage
-      - name: Add test response to use @tag.All
-        if: steps.checkAll.outputs.tags == ''
-        uses: nefrob/pr-description@v1.1.2
-        with:
-            content: |
-              <!-- This is an auto-generated comment: Cypress test results  -->
-              > [!WARNING]
-              > Whoa, @tag.All spotted in your test suite! 🚀
-              > While @tag.All is cool, like a catch-all net, why not try specific tags? 🏷️
-              > Narrow down your suite with specific tags for quicker and more accurate tests! 🚀 Less waiting, more zipping through tests like a ninja!
-              > Explore the tags documentation [here](https://www.notion.so/appsmith/Ok-to-test-With-Tags-7c0fc64d4efb4afebf53348cd6252918)
-
-              <!-- end of auto-generated comment: Cypress test results  -->
-
-            regex: "<!-- This is an auto-generated comment: Cypress test results  -->.*?<!-- end of auto-generated comment: Cypress test results  -->"
-            regexFlags: ims
-            token: ${{ secrets.GITHUB_TOKEN }}
-
       # In case of a runnable command, update the PR with run details
       - name: Add test response with link to workflow run
         uses: actions/github-script@v7