Revert "Fix CSS compilation"
Revert "Fix CSS compilation"

This reverts commit 8e18bca1dee2791c5408616a168ff84960d003bc. node-sass@3.4.2 works with the latest node LTS (v4.4.x), but not the latest, unstable node (v6.x.x). Programs may be installed in places where the node version is unpinned and defaults to 6.x.x.

edx/programs,edx/programs