use File;
if (File::exists(public_path('uploads/csv/img.png'))) {
File::delete(public_path('uploads/csv/img.png'));
}
// Delete a single file
File::delete($filename);
// Delete multiple files
File::delete($file1, $file2, $file3);
// Delete an array of files
$files = array($file1, $file2);
File::delete($files);
//And don't forget to add at the top:
use IlluminateSupportFacadesFile;
Storage::disk('public')->delete($media->filename);