diff --git a/.github/workflows/build_runson_ami.yaml b/.github/workflows/build_runson_ami.yaml
deleted file mode 100644
index 3d80ccdf763..00000000000
--- a/.github/workflows/build_runson_ami.yaml
+++ /dev/null
@@ -1,51 +0,0 @@
-name: Build RunsOn AMI
-
-on:
-    workflow_dispatch: {}
-    schedule:
-      # Runs at 12:00 PM (noon) on the 1st day of every month
-      - cron: '0 12 1 * *'
-
-jobs:
-  build_ami:
-    name: Build-AMI
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-      pull-requests: write
-    steps:
-      - name: Check out code
-        uses: actions/checkout@v6
-        with:
-          fetch-depth: 10
-      - name: Run packer
-        env:
-            GH_TOKEN: ${{ secrets.WORKER_PANTS_RUNSON_AMI_PAT }}
-            AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
-            AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-        run: |
-          set -ex
-
-          git config --local user.email "pantsbuild+github-automation@gmail.com"
-          git config --local user.name "Worker Pants (Pantsbuild GitHub Automation Bot)"
-
-          # In case we're running from a branch that isn't main (e.g., for debugging this workflow).
-          git fetch origin main
-
-          packer init build-support/packer/runson/runson.pkr.hcl
-          packer build build-support/packer/runson/runson.pkr.hcl
-          AMI_ID=`jq -r '.builds[-1].artifact_id | split(":")[1]' manifest.json`
-          yq -i ".images.\"ubuntu22-full-arm64-python3.7-3.13\".ami=\"$AMI_ID\"" .github/runs-on.yml
-
-          BRANCH_NAME="upgrade_runson_to_${AMI_ID}"
-          git checkout -b "${BRANCH_NAME}"
-          git add .github/runs-on.yml
-          git commit -m "Upgrade RunsOn AMI to ${AMI_ID}"
-          git push origin ${BRANCH_NAME}
-          gh pr create \
-            --base main \
-            --head ${BRANCH_NAME} \
-            --title "Upgrade RunsOn AMI to ${AMI_ID}" \
-            --body "" \
-            --label "release-notes:not-required" \
-            --reviewer "benjyw,tdyas"