Fix linter error in file_cleaner.go
What does this MR do and why?
The linter errors in file_cleaner.go are from https://github.com/ashanbrown/forbidigo. According to the linter, errors are because of forbid use of Print statements because they are likely just for debugging
How to set up and validate locally
Numbered steps to set up and validate the change are strongly suggested.
Edited by Changzheng Liu