Deprecate API v2 (#7761)

* deprecate api-v2

* remove v2 test helpers

* remove unused string

test/api/v2/user/tasks/POST-tasks.test.js

@@ -1,66 +0,0 @@
-import {
-  generateUser,
-  translate as t,
-} from '../../../../helpers/api-integration/v2';
-
-describe('POST /user/tasks', () => {
-  let user;
-
-  beforeEach(async () => {
-    user = await generateUser();
-  });
-
-  it('creates a task', async () => {
-    return user.post('/user/tasks').then((task) => {
-      expect(task.id).to.exist;
-    });
-  });
-
-  it('creates a habit by default', async () => {
-    return expect(user.post('/user/tasks'))
-      .to.eventually.have.property('type', 'habit');
-  });
-
-  it('creates a task with specified values', async () => {
-    return user.post('/user/tasks', {
-      type: 'daily',
-      text: 'My task',
-      notes: 'My notes',
-      frequency: 'daily',
-    }).then((task) => {
-      expect(task.type).to.eql('daily');
-      expect(task.text).to.eql('My task');
-      expect(task.notes).to.eql('My notes');
-      expect(task.frequency).to.eql('daily');
-    });
-  });
-
-  xit('does not create a task with an id that already exists', async () => {
-    let todo = user.todos[0];
-
-    return expect(user.post('/user/tasks', {
-      id: todo.id,
-    })).to.eventually.be.rejected.and.eql({
-      code: 409,
-      text: t('messageDuplicateTaskID'),
-    });
-  });
-
-  xit('TODO: no error is thrown - throws a 500 validation error if invalid type is posted', async () => {
-    return expect(user.post('/user/tasks', {
-      type: 'not-valid',
-    })).to.eventually.be.rejected.and.eql({
-      code: 500,
-      text: 'Cannot call method \'indexOf\' of undefined',
-    });
-  });
-
-  xit('TODO: no error is thrown - throws a 500 validation error if invalid data is posted', async () => {
-    return expect(user.post('/user/tasks', {
-      frequency: 'not-valid',
-    })).to.eventually.be.rejected.and.eql({
-      code: 500,
-      text: 'Task validation failed',
-    });
-  });
-});