Remove erroneous accessibility color contrast ignore rule (#5029)

investigated, turns out it is a legitimate color contrast problem

Author: LFDanLu

.storybook/test-runner.js

@@ -20,10 +20,6 @@ module.exports = {
     await configureAxe(page, {
       // TODO: Ideally would have a selector target for the storybook's sb main body element
       rules: [
-        {
-          id: 'color-contrast',
-          selector: 'body *:not([data-a11y-ignore="color-contrast"])'
-        },
         {
           id: 'aria-hidden-focus',
           selector: 'body *:not([data-a11y-ignore="aria-hidden-focus"])',

packages/@react-spectrum/datepicker/src/DatePickerSegment.tsx

@@ -65,8 +65,7 @@ function EditableSegment({segment, state}: DatePickerSegmentProps) {
         minWidth: segment.maxValue != null ? String(segment.maxValue).length + 'ch' : null
       }}
       data-testid={segment.type}>
-      {/* TODO: double check this, color contrast issue with quiet placeholder */}
-      <span data-a11y-ignore="color-contrast" aria-hidden="true" className={classNames(styles, 'react-spectrum-DatePicker-placeholder')}>{segment.placeholder}</span>
+      <span aria-hidden="true" className={classNames(styles, 'react-spectrum-DatePicker-placeholder')}>{segment.placeholder}</span>
       {segment.isPlaceholder ? '' : segment.text}
     </div>
   );