refactor: remove external link for dataset description guidance (#18884)

web/app/components/app/configuration/dataset-config/settings-modal/index.tsx

 import { useTranslation } from 'react-i18next'
 import { isEqual } from 'lodash-es'
 import { RiCloseLine } from '@remixicon/react'
-import { BookOpenIcon } from '@heroicons/react/24/outline'
 import { ApiConnectionMod } from '@/app/components/base/icons/src/vender/solid/development'
 import cn from '@/utils/classnames'
 import IndexMethodRadio from '@/app/components/datasets/settings/index-method-radio'
               className='resize-none'
               placeholder={t('datasetSettings.form.descPlaceholder') || ''}
             />
-            <a className='mt-2 flex h-[18px] items-center px-3 text-xs text-text-tertiary' href="https://docs.dify.ai/features/datasets#how-to-write-a-good-dataset-description" target='_blank' rel='noopener noreferrer'>
-              <BookOpenIcon className='mr-1 h-[18px] w-3' />
-              {t('datasetSettings.form.descWrite')}
-            </a>
           </div>
         </div>
         <div className={rowClass}>