remove slack-legacy.test.js

apps/app/test/integration/utils/slack-legacy.test.js

@@ -1,17 +0,0 @@
-const { getInstance } = require('../setup-crowi');
-
-describe('Slack Util', () => {
-
-  let crowi;
-  let slackLegacyUtil;
-
-  beforeEach(async() => {
-    crowi = await getInstance();
-    slackLegacyUtil = require('~/server/util/slack-legacy')(crowi);
-  });
-
-  test('postMessage method exists', () => {
-    expect(slackLegacyUtil.postMessage).toBeInstanceOf(Function);
-  });
-
-});