Revert "spice-html5: hack to enable secure console"

This is fixed in edeploy roles:
https://github.com/enovance/edeploy-roles/commit/dede76c3977383b9ab1cebd1072decc8de59cdf8

This reverts commit 1a3518050a7eeaab2a600a36a5a5ab405592520a.