API - Remove from List or Tag

What is the best way to remove a contact or group of contacts from a List or Tag? I don't see anything mentioned in the documentation for that. 

 

We have an external Click Dimensions opt in list we use, so I need to build calls over to Constant Contact and add or remove from Lists or Tags as needed. Would using the opt_out_date and the List or Tag ID in conjunction with the "Put (Update) a Contact" endpoint work?  Would that result in an opt out for that list? 

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