chore: cleanup wrong and unused doc links in i18 translations by appling docLink method usage (#21112)

web/i18n/en-US/common.ts

@@ -484,7 +484,6 @@ const translation = {
   apiBasedExtension: {
     title: 'API extensions provide centralized API management, simplifying configuration for easy use across Dify\'s applications.',
     link: 'Learn how to develop your own API Extension.',
-    linkUrl: 'https://docs.dify.ai/en/guides/extension/api-based-extension/README',
     add: 'Add API Extension',
     selector: {
       title: 'API Extension',