drop dietary choices, social events, and html_export_path

app/models/conference.rb

@@ -19,11 +19,9 @@ class Conference < ActiveRecord::Base
   has_one :email_settings, dependent: :destroy
   has_one :program, dependent: :destroy
   has_one :venue, dependent: :destroy
-  has_many :social_events, dependent: :destroy
   has_many :ticket_purchases, dependent: :destroy
   has_many :supporters, through: :ticket_purchases, source: :user
   has_many :tickets, dependent: :destroy
-  has_many :dietary_choices, dependent: :destroy
 
   has_many :lodgings, dependent: :destroy
   has_many :registrations, dependent: :destroy
@@ -38,9 +36,7 @@ class Conference < ActiveRecord::Base
   has_many :commercials, as: :commercialable, dependent: :destroy
   has_many :subscriptions, dependent: :destroy
 
-  accepts_nested_attributes_for :social_events, allow_destroy: true
   accepts_nested_attributes_for :venue
-  accepts_nested_attributes_for :dietary_choices, allow_destroy: true
   accepts_nested_attributes_for :tickets, allow_destroy: true
   accepts_nested_attributes_for :sponsorship_levels, allow_destroy: true
   accepts_nested_attributes_for :sponsors, allow_destroy: true

app/models/dietary_choice.rb

@@ -1,4 +0,0 @@
-class DietaryChoice < ActiveRecord::Base
-  belongs_to :conference
-  has_many :registrations
-end

app/models/registration.rb

@@ -1,9 +1,7 @@
 class Registration < ActiveRecord::Base
   belongs_to :user
   belongs_to :conference
-  belongs_to :dietary_choice
 
-  has_and_belongs_to_many :social_events
   has_and_belongs_to_many :events
   has_and_belongs_to_many :qanswers
   has_and_belongs_to_many :vchoices
@@ -12,7 +10,6 @@ class Registration < ActiveRecord::Base
   has_many :workshops, through: :events_registrations, source: :event
 
   accepts_nested_attributes_for :user
-  accepts_nested_attributes_for :social_events
   accepts_nested_attributes_for :qanswers
 
   delegate :name, to: :user

app/models/revision_observer.rb

@@ -12,7 +12,7 @@
 # in table 'conferences' looks like a more simple and straightforward solution
 #
 class RevisionObserver < ActiveRecord::Observer
-  observe :conference, :event, :room, :social_event, :track
+  observe :conference, :event, :room, :track
 
   def after_save(model)
     begin

app/models/social_event.rb

@@ -1,4 +0,0 @@
-class SocialEvent < ActiveRecord::Base
-  belongs_to :conference
-  has_and_belongs_to_many :registrations
-end