For clarification:
The verbiage used by the DNC on the 2008 (Obama) certification form was the same as the verbiage on the 2004 (Kerry) and 2000 (Gore) certification forms. None of the included a statement that their presidential nominee met the Constitutional requirements. So nothing was “left out” for Obama in 2008.
However, the State of Hawaii requires the certification form to include that statement. So the DNC did provide a separate certification form to Hawaii that included the required verbiage.
The RNC certification forms do have a statement indicating that their presidential nominee meets the Constitutional requirements.