Amazing, I got requirement that Change request option need not in workflow. I opened the workflow approval in AOT. Approval all options were there. As compare to other AOT objects where we enable disabled two properties without creating extension are “Label” and visible. But here nothing found. There is no option to modify anything “out of the box” workflow.
While exploring workflow designer configuring Workflow. I found that some properties when we drag approval object on workflow designer. Not step object inside approval.
In properties, I found some options. That works for me.
On workflow dialog change request options is gone.