Revert "Merge pull request #459 from alphagov/reset-font-for-print-stylesheet"

This reverts commit 98cf0594f215679e6f04cfeeacc3caa3d6fb0bd4, reversing
changes made to be36c53f80f861b2a9945c330d154c592ef599ef.

This was a temporary test for preview, which couldn't use a deployed branch for reasons.