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".
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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.