Remove unused mako option
Remove unused mako option

grep -r escape adhocracy/templates   doesn't find a single invocation of this method. Furthermore, we don't actually depend on markupsafe, so this has always worked by accident.

liqd/adhocracy,SysTheron/adhocracy,alkadis/vcv,DanielNeugebauer/adhocracy,SysTheron/adhocracy,phihag/adhocracy,phihag/adhocracy,alkadis/vcv,alkadis/vcv,phihag/adhocracy,liqd/adhocracy,alkadis/vcv,phihag/adhocracy,DanielNeugebauer/adhocracy,liqd/adhocracy,alkadis/vcv,DanielNeugebauer/adhocracy,liqd/adhocracy,phihag/adhocracy,SysTheron/adhocracy,DanielNeugebauer/adhocracy,DanielNeugebauer/adhocracy