The short answer is no - Citrus-Lime Cloud POS system does not contain a delete customer functionality. If you want to remove duplicate details, the best course of action is to adjust the existing details. If there is no sales history against the customer, you could remove all data and then change the name to something like "New Customer" as below:
Backoffice -
Point of Sale -
Once complete you could then re-purposed these customers when creating a new customer.
This process is only worth doing if the customer has no sales data, if they do have sale data then we would suggest going through the same process but renaming them to "DO NOT USE".