Remove duplicate setting of medians in migration

db/migrate/20171028230429_create_median_function.rb

@@ -1,21 +1,6 @@
 class CreateMedianFunction < ActiveRecord::Migration
   def up
     ActiveMedian.create_function
-
-    say "Calculating lifespan of known finished plantings"
-    Planting.where.not(planted_at: nil, finished_at: nil).each do |planting|
-      planting.calculate_lifespan
-      planting.save!
-      if planting.crop.median_lifespan.present?
-        say "#{planting.crop.name} median lifespan #{planting.crop.median_lifespan} days"
-      end
-    end
-
-    say 'Calculating median lifespan of crops'
-    # Crop.all.each do |crop|
-    #   crop.update_medians
-    #   say "#{crop.name} median lifespan #{crop.median_lifespan} days" if crop.median_lifespan.present?
-    # end
   end
 
   def down