I do not know, but I expect it will be before December 31, when the rail contract expires with Trillium Railway (which operates several other shortlines in the Hamilton and Niagara area). Service from Orangeville is increasingly sporadic; until mid this year, trains operated Tuesdays and Fridays, but now only one day a week - previously Tuesdays, but now most likely Fridays.
Though the line is still active, disused yard track and abandoned sidings have been recently removed, such as the long-abandoned siding at Cheltenham, which was just recently pulled out, and a half mile of track at the far northwestern end of Orangeville.