got rid of mass assignment in certain areas

app/models/paid_time_off.rb

@@ -1,5 +1,5 @@
 class PaidTimeOff < ActiveRecord::Base
-  attr_accessible :pto_earned, :pto_taken, :sick_days_earned, :sick_days_taken, :user_id
+  attr_accessible :pto_earned, :pto_taken, :sick_days_earned, :sick_days_taken
   belongs_to :user
   has_many :schedule, :foreign_key => :user_id, :primary_key => :user_id
 

app/models/retirement.rb

@@ -1,4 +1,4 @@
 class Retirement < ActiveRecord::Base
-  attr_accessible :employee_contrib, :employer_contrib, :total, :user_id
+  attr_accessible :employee_contrib, :employer_contrib, :total
   belongs_to :user
 end

app/models/schedule.rb

@@ -1,5 +1,5 @@
 class Schedule < ActiveRecord::Base
-  attr_accessible :date_begin, :date_end, :event_desc, :event_name, :event_type, :user_id
+  attr_accessible :date_begin, :date_end, :event_desc, :event_name, :event_type
   belongs_to :paid_time_off
   
   validates_presence_of :date_begin, :date_end