I've had my house for 2 years now and wanted to remove a walkway that the previous owners had put in the front yard. The walkway was lined with that metal flower bed trim, and one of the section goes right through a large live oak tree's main root. I've tried prying it out, but I've had very little luck and I'm at a loss on how to actually remove it without renting a chainsaw and cutting right through the root. Any suggestions? (Picture below)