Settings: drop the About sponsor row now that the card links to Afdian

src/app/(tabs)/settings.tsx

@@ -277,12 +277,6 @@ export default function SettingsScreen() {
           accessibilityHint={t('Open in the browser')}
           onPress={() => Linking.openURL(`${GITHUB_URL}`)}
         />
-        <Row
-          title={t('Sponsor')}
-          value={t('Afdian')}
-          accessibilityHint={t('Open in the browser')}
-          onPress={() => Linking.openURL(SPONSOR_URL)}
-        />
       </Section>
     </Screen>
   );

src/i18n/zh.ts

@@ -28,12 +28,10 @@ export const zh: Record<string, string> = {
   'Open this account to sign in again.': '请打开此账号重新登录。',
   'Tap refresh to load usage.': '点击刷新以加载用量。',
   Refresh: '刷新',
-  Sponsor: '赞助',
   'Support AI Usage': '支持 AI Usage',
   'AI Usage is free and has no ads. If it helps you, consider supporting development.':
     'AI Usage 免费且没有广告。如果它对你有帮助，欢迎支持开发。',
   'Support on Afdian': '去爱发电支持',
-  Afdian: '爱发电',
   'Search providers': '搜索提供商',
   'No provider matches "{query}".': '没有找到与“{query}”匹配的提供商。',
   'Browser sign-in is not in this build, so a sign-in code is used instead. Install the current development build to sign in through the browser.':