Remove failing post migration file

This change removes the post migration file that drops the
`analytics_repository_file_edits` table. The table is not in use,
however for some reason post migration has failed on PRD.

db/post_migrate/20191004134055_drop_unused_analytics_repository_file_edits.rb

-# frozen_string_literal: true
-
-class DropUnusedAnalyticsRepositoryFileEdits < ActiveRecord::Migration[5.2]
-  DOWNTIME = false
-
-  def up
-    # The table was never used, there is no app code that writes or reads the table. Safe to remove.
-    drop_table :analytics_repository_file_edits
-  end
-
-  def down
-    create_table :analytics_repository_file_edits do |t|
-      t.references :project,
-        index: true,
-        foreign_key: { on_delete: :cascade }, null: false
-      t.references :analytics_repository_file,
-        index: false,
-        foreign_key: { on_delete: :cascade },
-        null: false
-      t.date :committed_date,
-        null: false
-      t.integer :num_edits,
-        null: false,
-        default: 0
-    end
-
-    add_index :analytics_repository_file_edits,
-      [:analytics_repository_file_id, :committed_date, :project_id],
-      name: 'index_file_edits_on_committed_date_file_id_and_project_id',
-      unique: true
-  end
-end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2019_10_04_134055) do
+ActiveRecord::Schema.define(version: 2019_10_04_133612) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_trgm"
@@ -102,6 +102,15 @@ ActiveRecord::Schema.define(version: 2019_10_04_134055) do
     t.index ["project_id", "committed_date", "analytics_repository_file_id"], name: "index_file_commits_on_committed_date_file_id_and_project_id", unique: true
   end
 
+  create_table "analytics_repository_file_edits", force: :cascade do |t|
+    t.bigint "project_id", null: false
+    t.bigint "analytics_repository_file_id", null: false
+    t.date "committed_date", null: false
+    t.integer "num_edits", default: 0, null: false
+    t.index ["analytics_repository_file_id", "committed_date", "project_id"], name: "index_file_edits_on_committed_date_file_id_and_project_id", unique: true
+    t.index ["project_id"], name: "index_analytics_repository_file_edits_on_project_id"
+  end
+
   create_table "analytics_repository_files", force: :cascade do |t|
     t.bigint "project_id", null: false
     t.string "file_path", limit: 4096, null: false
@@ -3900,6 +3909,8 @@ ActiveRecord::Schema.define(version: 2019_10_04_134055) do
   add_foreign_key "analytics_language_trend_repository_languages", "projects", on_delete: :cascade
   add_foreign_key "analytics_repository_file_commits", "analytics_repository_files", on_delete: :cascade
   add_foreign_key "analytics_repository_file_commits", "projects", on_delete: :cascade
+  add_foreign_key "analytics_repository_file_edits", "analytics_repository_files", on_delete: :cascade
+  add_foreign_key "analytics_repository_file_edits", "projects", on_delete: :cascade
   add_foreign_key "analytics_repository_files", "projects", on_delete: :cascade
   add_foreign_key "application_settings", "namespaces", column: "custom_project_templates_group_id", on_delete: :nullify
   add_foreign_key "application_settings", "projects", column: "file_template_project_id", name: "fk_ec757bd087", on_delete: :nullify