Remove the mention of dangling links

Author: shivansh

fern/docs/pages/custom-links.mdx

@@ -90,7 +90,7 @@ curl --location 'https://api.devrev.ai/links.create' \
 When creating a link:
 - Set `link_type` to `"custom_link"`
 - Provide the link type ID in `custom_link_type`
-- Ensure both source and target objects exist to prevent dangling links
+- Ensure both source and target objects exist
 </Callout>
 
 ## List link types