Refactor /calendars into it's own controller

Spec it out too

app/helpers/conference_helper.rb

@@ -21,33 +21,4 @@ module ConferenceHelper
       '%20Sponsorship'
     ].join
   end
-
-  # adds events to icalendar for proposals in a conference
-  def icalendar_proposals(calendar, proposals, conference)
-    proposals.each do |proposal|
-      calendar.event do |e|
-        e.dtstart = proposal.time
-        e.dtend = proposal.time + proposal.event_type.length * 60
-        e.duration = "PT#{proposal.event_type.length}M"
-        e.created = proposal.created_at
-        e.last_modified = proposal.updated_at
-        e.summary = proposal.title
-        e.description = proposal.abstract
-        e.uid = proposal.guid
-        e.url = conference_program_proposal_url(conference.short_title, proposal.id)
-        v = conference.venue
-        if v
-          e.geo = v.latitude, v.longitude if v.latitude && v.longitude
-          location = ''
-          location += "#{proposal.room.name} - " if proposal.room.name
-          location += " - #{v.street}, " if v.street
-          location += "#{v.postalcode} #{v.city}, " if v.postalcode && v.city
-          location += "#{v.country_name}, " if v.country_name
-          e.location = location
-        end
-        e.categories = conference.title, "Difficulty: #{proposal.difficulty_level.title}", "Track: #{proposal.track.name}"
-      end
-    end
-    calendar
-  end
 end