Hide cookie notice panel in printed output.

[joedolson]

Description

Hides the cookie notice when printing the web page.

How Has This Been Tested?

CSS only change; tested in browser only. Test run: https://github.com/joedolson/wp-gdpr-cookie-notice/actions

Screenshots (jpeg or gifs if applicable):

Not applicable. Change is the absence of the cookie notice.

Types of changes

I'd consider this a bug fix, as it removes an obstruction of content in print views.

Checklist:

• [x ] My code is tested.
• [ x] My code is backward-compatible with WordPress 4.9.6 and PHP 7.0.
• [ x] My code follows the WordPress coding standards.
• [x ] My code has proper inline documentation.

[joedolson]

Whoops. I only reverted and re-ran that to run tests; I'd only intended to include the last commit in the PR. Well, nothing important in those changes, anyway.