fix(DatePickerPro): 修复 DatePickerPro 测试用例的eslint错误

Author: vaebe

packages/devui-vue/devui/date-picker-pro/__tests__/date-picker-pro.spec.tsx

@@ -346,7 +346,6 @@ describe('date-picker-pro test', () => {
 
  const button = rightArea.find('button');
  expect(button.exists()).toBeTruthy();
- const date = new Date();
  await button.trigger('click');
 
  await nextTick();

packages/devui-vue/devui/date-picker-pro/__tests__/range-date-picker-pro.spec.tsx

@@ -355,7 +355,6 @@ describe('range-date-picker-pro test', () => {
 
  const button = footer.find('button');
  expect(button.exists()).toBeTruthy();
- const date = new Date();
  await button.trigger('click');
 
  await nextTick();