WARNING: Deleting modules from your Content Bank removes them completely. They do not just move to your trash. You cannot recover items you accidentally delete. Please be sure before proceeding.
Navigate to your course Content Bank and click on the module you are interested in removing.
Click the More drop-down
From the drop-down menu, click Delete.
Read the delete warning. Please remember that once you click Delete, the item will not be recoverable.
If you are sure, click Delete and it will be removed from your Content Bank.