Merge pull request #31909 from overleaf/ds-removing-useIsNewEditorEnabled-2

[Part 2] Removing the usage of `useIsNewEditorEnabled` for editor tear down

GitOrigin-RevId: 864652da0edcedab4f3b1ba47d8d42fb65260118

services/web/frontend/js/shared/components/panel-heading.tsx

@@ -1,47 +0,0 @@
-import { FC } from 'react'
-import SplitTestBadge from '@/shared/components/split-test-badge'
-import MaterialIcon from '@/shared/components/material-icon'
-import { useTranslation } from 'react-i18next'
-import OLTooltip from '@/shared/components/ol/ol-tooltip'
-
-// TODO ide-redesign-cleanup: Remove this component and only use RailPanelHeader
-export const PanelHeading: FC<
-  React.PropsWithChildren<{
-    title: string
-    splitTestName?: string
-    children?: React.ReactNode
-    handleClose(): void
-  }>
-> = ({ title, splitTestName, children, handleClose }) => {
-  const { t } = useTranslation()
-
-  return (
-    <div className="panel-heading">
-      <div className="panel-heading-label">
-        <span>{title}</span>
-        {splitTestName && (
-          <SplitTestBadge
-            splitTestName={splitTestName}
-            displayOnVariants={['enabled']}
-          />
-        )}
-      </div>
-
-      {children}
-      <OLTooltip
-        id="close-panel"
-        description={t('close')}
-        overlayProps={{ placement: 'bottom' }}
-      >
-        <button
-          type="button"
-          className="btn panel-heading-close-button"
-          aria-label={t('close')}
-          onClick={handleClose}
-        >
-          <MaterialIcon type="close" />
-        </button>
-      </OLTooltip>
-    </div>
-  )
-}