message: remove obsoleted tests
  This is a followup to which makes the hub:writers stop being an event emitter.
diff: @@ -115,19 +115,6 @@ describe('git/writer', function() {
  });
  });
  - it('emits changed event', async function () {
  - let log = [];
  - writers.on('changed', message => log.push(message));
  - await writers.create('master', env.session, 'articles', {
  - type: 'articles',
  - attributes: {
  - title: 'Second Article'
  - }
  - });
  - expect(log).length(1);
  - });
  -
  -
  it('saves default attribute', async function() {
  await writers.create('master', env.session, 'things-with-defaults', {
  id: '1',
  @@ -416,22 +403,6 @@ describe('git/writer', function() {
  });
  - it('emits changed event', async function() {
  - let log = [];
  - writers.on('changed', message => log.push(message));
  - await writers.update('master', env.session, 'articles', '1', {
  - id: '1',
  - type: 'articles',
  - attributes: {
  - title: 'Updated title'
  - },
  - meta: {
  - version: head
  - }
  - });
  - expect(log).length(1);
  - });
  -
  it('returns unchanged field', async function() {
  let record = await writers.update('master', env.session, 'people', '1', {
  id: '1',
  @@ -643,13 +614,6 @@ describe('git/writer', function() {
  expect(articles).to.not.contain('1.json');
  });
  - it('emits changed event', async function() {
  - let log = [];
  - writers.on('changed', message => log.push(message));
  - await writers.delete('master', env.session, head, 'people', '1');
  - expect(log).length(1);
  - });
  -
  it('reports merge conflict', async function() {
  await writers.update('master', env.session, 'articles', '1', {
  id: '1',
  