At the moment, when you try to enter homework tag into a question you receive a message containing the text:
The 'homework' tag is not allowed.
Please do not use the 'homework' tag, it's currently deprecated and will be removed entirely within the week. For more information, please see the related meta discussion.
This was added there during the last cleanup before the removal of the blacklisted tag.
In my opinion, the sentence that it will be removed entirely within the week should be omitted. It made sense at the time when it was added, but now it is completely unnecessary.