If you want to delete a heading programmer step, just click the Heading Programmer button located on the left side of your game screen, then click the step you wish to delete. You will see this icon on your screen:
You will then have to confirm the deletion by clicking this button:
Once it is deleted, your decision cannot be reverted.
Deleting a heading programmer step will not restore the cards you used to activate it. These cards will be lost.
You can however edit an existing programming step. Doing this will not require any extra cards.