Hii Abdullah ,

Please find code in Comment. 

Note: Make sure that you have on hand quantities of the product to be sold otherwise it will raise error message 
"You cannot validate a transfer if no quantities are reserved nor done. To force the transfer, switch in edit mode and encode the done quantities."

Thanks & Regards,
Email: odoo@aktivsoftware.com
Skype: kalpeshmaheshwari

Hello this is Gulshan Negi

Well, by creating a custom module and overriding the method, you can modify the action_confirm method of a sale order in Odoo. You can modify the procedure in the following manner to skip the product quantity validation step and immediately deliver the order:

@api.multi
def action_confirm(self):
for order in self:
# Skip product quantity validation step
order.state = 'sale'
# Deliver the order
order.action_done()
return True

I hope you are clear now.