If you remember which workspace this report belongs to, please navigate to this workspace and click on Manage Embed Codes to find the code and delete it: -us/power-bi/service-publish-to-web#managing-embed-codes
If you remember which workspace this report belongs to, please navigate to this workspace and click on Manage Embed Codes to find the code and delete it: -us/power-bi/service-publish-to-web#managing-embed-codes