Remove last of unused gdocs functionality

Author: Redande

app/controllers/points_controller.rb

@@ -47,13 +47,6 @@ def index
     end
   end
 
-  def refresh_gdocs
-    authorize! :refresh, @course
-    @sheetname = params[:id]
-    @course = Course.find(params[:course_id])
-    @notifications = @course.refresh_gdocs_worksheet @sheetname
-  end
-
   def show
     @sheetname = params[:id]
     @course = Course.find(params[:course_id])

app/models/ability.rb

@@ -20,9 +20,6 @@ def initialize(user)
       can :disable, Organization
 
       can :rerun, Submission
-      can :refresh_gdocs_spreadsheet, Course do |c|
-        c.spreadsheet_key.present?
-      end
       can :access, :pghero
       can :read_vm_log, Submission
       can :read, :instance_state