fix for eka7a mistake that actually removes all vouchers instead of just one

https://github.com/opencart/opencart/commit/0a5ba70b49af97d3cdbbc644f251f143493ea742

fix for as validation of the cart quality is complete not required!

https://github.com/opencart/opencart/commit/ac033e32f2ff8f89078f7b03b18a19d61dbc2c92

stop trying to fix stuff that is not broken!