ng-zorro-antd/date-picker/style/patch.less

An enterprise-class UI components based on Ant Design and Angular

// inline mode
.@{picker-prefix-cls}-inline {
  border: none;
  padding: 0;
  .@{picker-prefix-cls} {
    &-range-arrow {
      display: none !important;
    }
    &-dropdown {
      z-index: auto;
    }
  }
}