Step 1: Tap Menu OneDrive Menu > Recycle bin. (For Windows 8 or 8.1, tap Menu OneDrive Menu > Settings > Accounts. Select the account, then tap View Recycle Bin.)
Step 2: In the Recycle Bin view, select the files you want to delete.
Step 3: Tap Delete Delete icon for OneDrive for Windows 10 mobile to remove the files permanently.