[FSSDK-10201] unused import removal

Author: junaed-optimizely

lib/utils/microtask/index.tests.js

@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-import { assert } from 'chai';
-import { scheduleMicrotaskOrTimeout } from '.'; 
+import { scheduleMicrotaskOrTimeout } from './'; 
 
 describe('scheduleMicrotaskOrTimeout', () => {
   it('should use queueMicrotask if available', (done) => {