Drop parks#established_date

db/migrate/20251008044109_create_parks.rb

@@ -3,7 +3,6 @@ class CreateParks < ActiveRecord::Migration[8.0]
     create_table :parks do |t|
       t.string :code, null: false
       t.string :name, null: false
-      t.datetime :established_date, null: false
       t.text :states, null: false
       t.json :properties, null: false, default: {}
 

db/schema.rb

@@ -14,7 +14,6 @@ ActiveRecord::Schema[8.0].define(version: 2025_10_08_044109) do
   create_table "parks", force: :cascade do |t|
     t.string "code", null: false
     t.string "name", null: false
-    t.datetime "established_date", null: false
     t.text "states", null: false
     t.json "properties", default: {}, null: false
     t.datetime "created_at", null: false

test/fixtures/parks.yml

@@ -3,13 +3,11 @@
 one:
   code: crla
   name: Crater Lake National Park
-  established_date: 2025-10-07 21:41:09
   states: OR
   properties:
 
 two:
   code: olym
   name: Olympic National Park
-  established_date: 2025-10-07 21:41:09
   states: WA
-  properties: 
+  properties: