Do you plan to reuse the metal? Is there a tripping hazard likelihood?
Personally, I'd probably leave it be.
Alternatives include cutting off both ends of post with a sawzall...
Or cutting through overgrown lip of the tree with chainsaw...
Kind of dangerous to do the chainsaw work... but it is possible... Or... maybe just use a hand saw...
Not sure that it's worth doing though... Or whether the tree would survive the operation....
"The operation was a success, but the patient died."
