move journal code to persional_journal modulaar

app/models/user/co_author.rb

@@ -1,20 +0,0 @@
-class CoAuthor
-  include Mongoid::Document
-
-  LANGUAGE_TYPES = [ "English", "Chinese" ]
-
-  field :name_id, type: BSON::ObjectId
-  field :co_author, localize: true
-  field :email
-
-  belongs_to :co_author_relations
-
-  VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/
-  validates :email, format: { with: VALID_EMAIL_REGEX },
-            allow_blank: true,
-            uniqueness: { case_sensitive: false }
-
-  validates :co_author, presence: true
-  before_save { |coauthor| coauthor.email = email.downcase if not coauthor.email.nil?}
-end
-

app/models/user/co_author_relation.rb

@@ -1,11 +0,0 @@
-class CoAuthorRelation
-  include Mongoid::Document
-  include Mongoid::Timestamps
-
-  field :relation, localize: true
-
-  has_and_belongs_to_many :co_authors
-
-  validates :relation, presence: true,
-            uniqueness: { case_sensitive: false }
-end