Drop Organization from database

Rolling back this feature. It was a nice attempt but no one ever followed up
and made this something else than a code of conduct holder...

db/migrate/20181229233812_drop_organizations.rb

@@ -0,0 +1,11 @@
+class DropOrganizations < ActiveRecord::Migration[7.0]
+  def change
+    drop_table :organizations do |t|
+      t.string :name, null: false
+      t.text :description
+      t.string :picture
+    end
+
+    remove_reference :conferences, :organization, index: true
+  end
+end

db/migrate/20181229233813_add_code_of_conduct_to_conference.rb

@@ -0,0 +1,5 @@
+class AddCodeOfConductToConference < ActiveRecord::Migration[7.0]
+  def change
+    add_column :conferences, :code_of_conduct, :text
+  end
+end