Replacing seats in an Eagle 15.6

I have an Eagle 15.6 three person canoe. This appears to be the same canoe as a Sun dolphin Mackinaw 15.6 (not the square back). I’m trying to lighten the boat up some and was thinking of replacing the 3 plastic seats with 2 ash seats and a center thwart. The seats however are mounted though the hull instead of hung off the gunnels and each has a support leg to the hull… I had heard (but unable to verify) that these supports where needed for structural support. Would there be a problem replacing these seats with a more traditional canoe seat.