Remove code that generates little x links

User research shows us that nobody ever clicks the small 'x's that are used to clear the facet criteria, so we're going to remove them and see if anybody notices.
This commit removes the code that builds the x and the links.
Remove unused scss

We're not using this css since we've removed the little xs from search descriptors
Make sure value labels are html_escaped
Merge pull request #117 from alphagov/remove-tiny-xs

Remove tiny xs