Basement Footer Removal
They removed a portion of an exterior basement wall...maybe because, 1) started a remodel/addition and then changed their minds, 2) discovered something outside the wall that changed their minds, 3) noticed remaining walls starting to “move” and stopped project. 

Yes, I’d get a structural engineer (not a civil engineer) to review. 

You must live in a dry area if there’s no moisture problems with the wall gone, but I’d have him examine that too. 

BTW, I’d be shocked if the structural engineer recommends removing the footing.