Hide Save Draft Button from Task

We have a site page which has image links to open tasks. We get the task ids using getactivetaskidsforprocess function. When we access the form from this link, the Save Draft button is visible even after disabling the "Allow Users to Save a Draft of In-Progress Tasks" check box in forms tab. Any suggestions would be helpful.

Note: The forms doesn't have Save Draft button if we go to next screen and come back to the form. We are unable to hide this button only when we access task through task links from the site.

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