Update vehicle tax text
Update vehicle tax text

Tax discs no longer exist, so update the text to reflect that.

https://www.pivotaltracker.com/story/show/79851802

tijmenb/spotlight,alphagov/spotlight,keithiopia/spotlight,alphagov/spotlight,keithiopia/spotlight,keithiopia/spotlight,alphagov/spotlight,tijmenb/spotlight,tijmenb/spotlight