Remove Subcategory column from review table (#213)

app/views/events/_table.html.haml

@@ -7,7 +7,6 @@
         - if @conference.ticket_server_enabled?
           %th= sort_link @search, :ticket_id, 'Ticket', :term => params[:term]
         %th= sort_link @search, :track_name, 'Theme', :term => params[:term]
-        %th= sort_link @search, :subcategory_name, 'Subcategory', :term => params[:term]
         %th= sort_link @search, :event_type, 'Type', :term => params[:term]
         - if can? :crud, Event
           %th= sort_link @search, :state, 'State', :term => params[:term]
@@ -17,7 +16,6 @@
         - if @conference.ticket_server_enabled?
           %th Ticket
         %th Theme
-        %th Subcategory
         %th Type
         - if can? :crud, Event
           %th State