Revert "docs: fix DatePicker start end demo"
Revert "docs: fix DatePicker start end demo"

This reverts commit b9120980fb813c83fe8215494bca7de0f4f8c27b.

elevensky/ant-design,elevensky/ant-design,icaife/ant-design,elevensky/ant-design,zheeeng/ant-design,zheeeng/ant-design,havefive/ant-design,icaife/ant-design,ant-design/ant-design,ant-design/ant-design,icaife/ant-design,havefive/ant-design,havefive/ant-design,zheeeng/ant-design,zheeeng/ant-design,elevensky/ant-design,havefive/ant-design,icaife/ant-design,ant-design/ant-design,ant-design/ant-design