DELETE /collections/:collectionkey/resources/:resourcekey.format removes a resource you own from a collection. It does not delete the resource from 4theFile
curl -u user:apikey -X DELETE https://4thefile.com/api_v1/collections/ESuVkqZF/resources/Wgo3oLtl.xml
<?xml version="1.0" encoding="UTF-8"?> <data> <message>Removed resource Wgo3oLtl from collection ESuVkqZF</message> <resource_link>https://4thefile.com/api_v1/resources/Wgo3oLtl.xml</resource_link> </data>