Remove validates_associated_of calls which target the user model as

we have a number of users with minor validation failures.

app/models/changeset.rb

@@ -19,7 +19,6 @@ class Changeset < ActiveRecord::Base
   validates_numericality_of :min_lat, :max_lat, :min_lon, :max_lat, :allow_nil => true, :integer_only => true
   validates_numericality_of :user_id,  :integer_only => true
   validates_numericality_of :num_changes, :integer_only => true, :greater_than_or_equal_to => 0
-  validates_associated :user
 
   # over-expansion factor to use when updating the bounding box
   EXPAND = 0.1

app/models/diary_entry.rb

@@ -20,6 +20,5 @@ class DiaryEntry < ActiveRecord::Base
                             :greater_than_or_equal_to => -90, :less_than_or_equal_to => 90
   validates_numericality_of :longitude, :allow_nil => true,
                             :greater_than_or_equal_to => -180, :less_than_or_equal_to => 180
-  validates_associated :user
   validates_associated :language
 end

app/models/message.rb

@@ -7,7 +7,6 @@ class Message < ActiveRecord::Base
   validates_presence_of :title, :body, :sent_on, :sender, :recipient
   validates_length_of :title, :within => 1..255
   validates_inclusion_of :message_read, :in => [ true, false ]
-  validates_associated :sender, :recipient
   validates_as_utf8 :title
 
   def digest