I'm not sure how? This is just removing the project so that fleets are not stuck with it who can not complete it. The exchange is now the only way to get these commodities (unless fellow fleet mates have unopened commodity bundles, or are keeping extra in their banks). The project was always listed as a "limited-time" and at least one dev posted that we'd offer a solution to remove it if you were not able to finish it so you were not stuck with it And we're giving notice if you'd like to actually finish it.
Why not just allow fleet leaders to dismiss it if they wish instead of forcing the choice on everyone?