If you have files or folders that you no longer need, you can delete them through File Manager in your cPanel. Please follow the instructions below on how to delete file/folder:
Step 1. Log in to the cPanel.
Step 2. Click on "File Manager" under Files panel.
Step 3. Select the directory where the file/folder is located.
Step 4. Select the file or folder and click "Delete".
Step 5. Confirm and delete the file by clicking on checkbox "Skip the trash and permenantly delete the files".
Note: Another way is by right-clicking the item and selecting Delete option.