Yes they have been eliminated as per CRA-
Children’s arts amount (line 370) – As of January 1, 2017, this amount has been eliminated.
Children’s fitness tax credit (lines 458 and 459) – As of January 1, 2017, this credit has been eliminated.
See this link for the changes to Ontario for tax year 2017- https://www.canada.ca/en/revenue-agency/services/forms-publications/tax-packages-years/general-incom...
