Help Deleting a publicfolder type smtp via powershell

So I cannot sync a old former smtp to 365 because it apparently exists as a publicfolder type, However "get-publicfolder" does not work since we never created or mounted any. This command below shows there's some sort of entry but can't seem to figure out how to delete it

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get-recipient opacctg@xx.com | FT recipient*

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RecipientType RecipientTypeDetails

------------- --------------------

PublicFolder PublicFolder

​

Any ideas or help would be appreciated!