No, the Ontario Human Rights Code and the AODA both deal with accessibility, but they are two very different pieces of legislation. The Ontario Human Rights Code addresses discrimination in an individual, complaints-based way. The Integrated Accessibility Standards Regulation applies to all organizations in Ontario and will increase accessibility for all.
The Integrated Accessibility Standards Regulation does not replace or affect legal rights or obligations that arise as a result of the Ontario Human Rights Code and other laws relating to the accommodation of people with disabilities. This means that the Ontario Human Rights Code or other applicable legislation may require additional accommodation measures that go beyond, or differ from, the standards established by AODA regulations.