ci: remove development-only bootstrap tests

diff --git a/.github/intentional-ci.md b/.github/intentional-ci.md
index 69fe20f..cab0d59 100644
--- a/.github/intentional-ci.md
+++ b/.github/intentional-ci.md

@@ -41,9 +41,3 @@
 Implementation changes can stay on the development branch while the listener
 and ordinary workflows on `master` remain stable. Submit the completed design
 and any proposed project-wide rollout together for review.
-
-Run the listener regression tests locally with:
-
-```sh
-node --test .github/tests/intentional-ci.test.cjs
-```

diff --git a/.github/tests/intentional-ci.test.cjs b/.github/tests/intentional-ci.test.cjs
deleted file mode 100644
index 0f4d287..0000000
--- a/.github/tests/intentional-ci.test.cjs
+++ /dev/null

@@ -1,96 +0,0 @@
-const assert = require('node:assert/strict');
-const fs = require('node:fs');
-const path = require('node:path');
-const {test} = require('node:test');
-
-// Exercise the actual inline github-script without checking out or running PR code.
-const workflow = fs.readFileSync(path.join(__dirname, '../workflows/intentional-ci.yml'), 'utf8');
-const block = workflow.match(/          script: \|\n((?:            .*\n|\n)+)/)[1];
-const AsyncFunction = Object.getPrototypeOf(async function () {}).constructor;
-const dispatch = new AsyncFunction('github', 'context', 'core',
-  block.split('\n').map(line => line.slice(12)).join('\n'));
-
-async function run({command = '/ci full', pr = {}, commenter = 'rwgk', status} = {}) {
-  const requests = [];
-  const failures = [];
-  const summaries = [];
-  const summary = {
-    addHeading(value) { summaries.push(value); return this; },
-    addRaw() { return this; },
-    addCodeBlock() { return this; },
-    async write() {},
-  };
-  const github = {rest: {
-    pulls: {async get() { return {data: {
-      number: 123, state: 'open', user: {login: 'rwgk'},
-      labels: [{name: 'ci:intentional'}],
-      head: {sha: '1'.repeat(40)}, base: {sha: '2'.repeat(40)}, ...pr,
-    }}; }},
-    actions: {async createWorkflowDispatch(request) {
-      if (status) throw Object.assign(new Error('API failure'), {status});
-      requests.push(request);
-    }},
-  }};
-  const context = {
-    repo: {owner: 'pybind', repo: 'pybind11'}, issue: {number: 123},
-    payload: {comment: {body: command, id: 456, user: {login: commenter}}},
-  };
-  await dispatch(github, context, {summary, setFailed(message) { failures.push(message); }});
-  return {requests, failures, summaries};
-}
-
-for (const profile of ['full', 'quick']) {
-  test(`dispatch ${profile} with frozen revisions to the fixed worker`, async () => {
-    const {requests} = await run({command: `/ci ${profile}`});
-    assert.equal(requests.length, 1);
-    const {inputs, ...destination} = requests[0];
-    assert.deepEqual(destination, {
-      owner: 'pybind', repo: 'pybind11', workflow_id: 'intentional-ci.yml',
-      ref: 'intentional-ci-experiment',
-    });
-    assert.deepEqual(JSON.parse(inputs.request), {
-      pr: 123, profile, head_sha: '1'.repeat(40), base_sha: '2'.repeat(40), comment_id: 456,
-    });
-  });
-}
-
-for (const command of ['/ci', '/ci all', '/ci full extra', '> /ci full', '/ci full\nplease', '/ci full; echo unsafe']) {
-  test(`ignore unrecognized command ${JSON.stringify(command)}`, async () => {
-    assert.deepEqual((await run({command})).requests, []);
-  });
-}
-
-for (const pr of [{state: 'closed'}, {user: {login: 'someone-else'}}, {labels: []}, {labels: [{name: 'ci:manual'}]}]) {
-  test(`ignore PR outside the pilot: ${JSON.stringify(pr)}`, async () => {
-    assert.deepEqual((await run({pr})).requests, []);
-  });
-}
-
-test('other PR authors can request CI on their own opted-in PRs', async () => {
-  const result = await run({commenter: 'contributor', pr: {user: {login: 'contributor'}}});
-  assert.equal(result.requests.length, 1);
-  assert.deepEqual(result.failures, []);
-});
-
-test('reject requests from someone other than the PR author', async () => {
-  assert.deepEqual((await run({commenter: 'someone-else'})).requests, []);
-});
-
-test('help explains the pilot without dispatching', async () => {
-  const result = await run({command: '/ci help'});
-  assert.deepEqual(result.requests, []);
-  assert.deepEqual(result.summaries, ['Intentional CI experiment']);
-});
-
-for (const status of [404, 422]) {
-  test(`missing or incompatible worker fails clearly (${status})`, async () => {
-    const result = await run({status});
-    assert.deepEqual(result.requests, []);
-    assert.match(result.failures[0], /intentional-ci-experiment/);
-    assert.deepEqual(result.summaries, []);
-  });
-}
-
-test('unexpected API errors propagate', async () => {
-  await assert.rejects(run({status: 503}), /API failure/);
-});

diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index bfbbb94..76d64ad 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml

@@ -34,9 +34,6 @@
       run: echo "::add-matcher::$GITHUB_WORKSPACE/.github/matchers/pylint.json"
     - uses: pre-commit/action@v3.0.1
 
-    - name: Test intentional CI bootstrap
-      run: node --test .github/tests/intentional-ci.test.cjs
-
   clang-tidy:
     if: (github.event_name != 'pull_request' || !contains(github.event.pull_request.labels.*.name, 'ci:intentional'))
     # When making changes here, please also review the "Clang-Tidy" section