ci(release): remove R2 publish from release workflow (#484)

R2 publishing is now a separate workflow (publish-r2.yml) that can be
triggered manually via workflow_dispatch with a specific release_run_id.

Co-authored-by: Droid Agent <droid@factory.ai>

Author: echobt

.github/workflows/release.yml

@@ -400,18 +400,4 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-  # ==========================================================================
-  # Publish CLI to R2 (lightweight - 4 vCPU)
-  # ==========================================================================
-  publish-r2:
-    name: Publish to R2
-    needs: [prepare, build-cli, release]
-    if: needs.prepare.outputs.build_cli == 'true' && needs.build-cli.result == 'success'
-    uses: ./.github/workflows/publish-r2.yml
-    with:
-      version: ${{ needs.prepare.outputs.version }}
-      channel: ${{ contains(needs.prepare.outputs.version, '-') && 'beta' || 'stable' }}
-    secrets:
-      R2_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
-      R2_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
-      CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+