Revert "ci(weight-diff): also post diff inside full-benchmark job"

This reverts commit 6a39339.

Author: dmoka

.github/workflows/tests.yml

@@ -189,54 +189,6 @@ jobs:
 
           echo "Successfully pushed benchmark results to branch ${{ github.head_ref || github.ref_name }}"
 
-      # Weight diff for full bench runs. The standalone weight-diff workflow
-      # can't trigger off the bot's push (GITHUB_TOKEN does not retrigger
-      # workflows), so we compute and post the diff here instead. Both writers
-      # use the same `weight-diff` sticky header, so this overwrites the
-      # last comment from the standalone workflow.
-      - name: Materialize master weights for weight-diff
-        if: steps.prepare.outputs.benchmark_type == 'full'
-        run: |
-          git fetch --no-tags --depth=1 origin master:refs/remotes/origin/master
-          mkdir -p /tmp/weights-master/runtime/hydradx/src/weights
-          git archive origin/master runtime/hydradx/src/weights 2>/dev/null \
-            | tar -x -C /tmp/weights-master || true
-
-      - name: Generate weight diff report
-        if: steps.prepare.outputs.benchmark_type == 'full'
-        id: weight-diff
-        run: |
-          set -euo pipefail
-          python3 scripts/weight-diff/weight_diff.py \
-            --old /tmp/weights-master/runtime/hydradx/src/weights \
-            --new runtime/hydradx/src/weights \
-            > weight-diff-report.md
-
-          if grep -q 'No weight changes detected' weight-diff-report.md; then
-            echo "has_changes=false" >> "$GITHUB_OUTPUT"
-          else
-            echo "has_changes=true" >> "$GITHUB_OUTPUT"
-          fi
-
-          echo "----- report preview -----"
-          head -40 weight-diff-report.md
-
-      - name: Post weight-diff comment after full bench
-        if: steps.prepare.outputs.benchmark_type == 'full' && steps.weight-diff.outputs.has_changes == 'true'
-        uses: marocchino/sticky-pull-request-comment@v2.1.0
-        with:
-          header: weight-diff
-          path: weight-diff-report.md
-          number: ${{ steps.prepare.outputs.pr_number }}
-
-      - name: Remove stale weight-diff comment after full bench (no changes)
-        if: steps.prepare.outputs.benchmark_type == 'full' && steps.weight-diff.outputs.has_changes == 'false'
-        uses: marocchino/sticky-pull-request-comment@v2.1.0
-        with:
-          header: weight-diff
-          delete: true
-          number: ${{ steps.prepare.outputs.pr_number }}
-
       - name: Comment benchmark results to the pull request
         if: github.event_name == 'pull_request'
         uses: marocchino/sticky-pull-request-comment@v2.1.0