Delete enum backfill data migration, already run in production (#4008)

This data migration has been run in production

Follow up from:

- #3936
- #3937
- #3938
- #3939

Author: veganstraightedge

config/application.rb

@@ -10,9 +10,6 @@
 require_relative '../app/middlewares/rack/teapot'
 require 'rack/contrib'
 
-# TEMP: enum backfill data migration class
-require_relative '../db/data_migrate'
-
 # Require the gems listed in Gemfile, including any gems
 # you've limited to :test, :development, or :production.
 Bundler.require(*Rails.groups)