diff --git a/.github/workflows/docker-build-dispatch.yml b/.github/workflows/docker-build-dispatch.yml
deleted file mode 100644
index cf9f5f5ef6..0000000000
--- a/.github/workflows/docker-build-dispatch.yml
+++ /dev/null
@@ -1,47 +0,0 @@
-# Sets the docker-build commit status (pending) and triggers the image build for a PR commit.
-name: Docker build dispatch
-
-on:
-  workflow_run:
-    workflows: ["Docker build trigger"]
-    types: [completed]
-
-permissions:
-  contents: read
-  statuses: write
-
-concurrency:
-  group: docker-build-dispatch-${{ github.event.workflow_run.head_sha }}
-  cancel-in-progress: true
-
-jobs:
-  dispatch:
-    name: Post status + dispatch build
-    if: >-
-      github.event.workflow_run.conclusion == 'success' &&
-      github.event.workflow_run.head_repository.full_name == github.repository
-    runs-on: ubuntu-latest
-    steps:
-      - name: Set docker-build status (pending)
-        env:
-          GH_TOKEN: ${{ github.token }}
-          REPO: ${{ github.repository }}
-          HEAD_SHA: ${{ github.event.workflow_run.head_sha }}
-        run: |
-          set -euo pipefail
-          gh api -X POST "/repos/${REPO}/statuses/${HEAD_SHA}" \
-            -f state='pending' \
-            -f context='docker-build' \
-            -f description='Queued — waiting for build to start.'
-
-      - name: Dispatch build
-        env:
-          GH_TOKEN: ${{ secrets.CI_DISPATCH_TOKEN }}
-          DISPATCH_REPO: ${{ secrets.CI_DISPATCH_REPO }}
-          REF: ${{ github.event.workflow_run.head_sha }}
-        run: |
-          set -euo pipefail
-          jq -n \
-            --arg ref "${REF}" \
-            '{event_type: "docker-pr-build", client_payload: {ref: $ref}}' \
-          | gh api -X POST "/repos/${DISPATCH_REPO}/dispatches" --input -
diff --git a/.github/workflows/docker-build-liveness.yml b/.github/workflows/docker-build-liveness.yml
deleted file mode 100644
index 7b044c553e..0000000000
--- a/.github/workflows/docker-build-liveness.yml
+++ /dev/null
@@ -1,52 +0,0 @@
-# Fails docker-build statuses that never completed.
-name: Docker build liveness
-
-on:
-  schedule:
-    - cron: "*/15 * * * *"
-  workflow_dispatch: {}
-
-permissions:
-  contents: read
-  statuses: write
-
-jobs:
-  reap:
-    name: Fail stale docker-build statuses
-    runs-on: ubuntu-latest
-    steps:
-      - name: Reap stale statuses
-        uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b # v7
-        env:
-          TIMEOUT_MIN: ${{ vars.DOCKER_BUILD_TIMEOUT_MIN || '90' }}
-        with:
-          github-token: ${{ github.token }}
-          script: |
-            const timeoutMin = Number(process.env.TIMEOUT_MIN);
-            const now = Date.now();
-            const { owner, repo } = context.repo;
-
-            const prs = await github.paginate(github.rest.pulls.list, {
-              owner, repo, state: 'open', per_page: 100,
-            });
-
-            let failed = 0;
-            for (const pr of prs) {
-              const { data } = await github.rest.repos.getCombinedStatusForRef({
-                owner, repo, ref: pr.head.sha,
-              });
-              const status = data.statuses.find((s) => s.context === 'docker-build');
-              if (!status || status.state !== 'pending') continue;
-
-              const ageMin = (now - new Date(status.created_at).getTime()) / 60000;
-              if (ageMin <= timeoutMin) continue;
-
-              await github.rest.repos.createCommitStatus({
-                owner, repo, sha: pr.head.sha,
-                state: 'failure', context: 'docker-build',
-                description: 'Build timed out — re-run "Docker build trigger" in Actions.',
-              });
-              failed++;
-              core.info(`Failed stale docker-build (pending, ${ageMin.toFixed(1)}m) on PR #${pr.number} @ ${pr.head.sha}`);
-            }
-            core.info(`Reaped ${failed} stale docker-build status(es) across ${prs.length} open PR(s).`);
diff --git a/.github/workflows/docker-build-trigger.yml b/.github/workflows/docker-build-trigger.yml
deleted file mode 100644
index 2f182ccebc..0000000000
--- a/.github/workflows/docker-build-trigger.yml
+++ /dev/null
@@ -1,20 +0,0 @@
-# Triggers the Docker build check on pull requests.
-name: Docker build trigger
-
-on:
-  pull_request:
-    types: [opened, synchronize, reopened]
-
-permissions:
-  contents: read
-
-concurrency:
-  group: docker-build-trigger-${{ github.event.pull_request.number || github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  requested:
-    name: Signal docker build requested
-    runs-on: ubuntu-latest
-    steps:
-      - run: echo "Docker build requested."