There are a few OFBiz images left behind in the image folder in the image component.
The images are:
Done at revision: 1753774
This is certainly not a major issue but I see no reasons to keep these old unused images. I'll put a note in Attic.
While doing so I decided to remove opentravelsystem_logo.jpg and also to hide the bin folder (in OFBiz root) in Windows, it was confusing!