Bug 1633971 - comment SWGL's span rasterizer. DONTBUILD r=jimb
Bug 1633971 - comment SWGL's span rasterizer. DONTBUILD r=jimb

Differential Revision: https://phabricator.services.mozilla.com/D73000

[ghsync] From https://hg.mozilla.org/mozilla-central/rev/0c2cf91fb40418aa65cc1bf567f3f46d7de02853

servo/webrender,servo/webrender,servo/webrender,servo/webrender,servo/webrender,servo/webrender