From what I understand, you're the Admin of a Dropbox for Business Teams account and you'd like to automate the process of a suspended member's deletion so as not to have to go through the Admin's Console to free up the license - correct me if I'm wrong please.
Would you like to automate the process by utilizing our API perhaps? If so, please let me know and I'll forward this to the right section of our Community for you asap.
I have just moved your post under the API Support Feedback section of our Community so the right people can get to your inquiry right away while there might be other same-minded users here that could pitch in on how you should go about doing this - automating the deletion of suspended members from a team account that is to free up their licenses.
I hope this is helpful to you and I'm wishing you a great rest of your day!