Go to PLIC.io. Click on Projects on the left-side of the page. After you have found your project, click on the project. Once the project details are loaded, click on the Project Actions dropdown.
Click on Delete Project.
A prompt will appear to make sure you are deleting the correct project. Once you are sure the project name matches the name of the project you want to delete, check the box and click Delete.
Please note that deleting a project that is connected to a Blueprint gallery will not be easily linked if the PLIC project is deleted. If you have any questions, feel free to reach out to our support team before deleting a project.