fstests: Fix TestObjectRemove failures
fstests: Fix TestObjectRemove failures

This was failing because TestPublicLink was causing the file to be
modified with Google drive.

olihey/rclone,yonjah/rclone,seuffert/rclone,olihey/rclone,ncw/rclone,B4dM4n/rclone,B4dM4n/rclone,seuffert/rclone,olihey/rclone,yonjah/rclone,yonjah/rclone,yonjah/rclone,ncw/rclone,olihey/rclone,ncw/rclone,ncw/rclone,B4dM4n/rclone,seuffert/rclone,seuffert/rclone,B4dM4n/rclone