This command lets the student to delete a pinned message from their private pinning board.
The code that implements the above mentioned gits functionality is located here.
deleteMessage(self, ctx, tagname: str):
This function takes as arguments the values provided by the constructor through self, context in which the command was called, and the tag-name of the pinned message.
Let's say that you are in the server that has the Classmate Bot active and online. All you have to do is enter the command 'unpin' and the tagname of the message you want to unpin.
$unpin TAGNAME
$unpin HW
Successful execution of this command will unpin the message with the tagname for the specific user.