Remove postgis reference.

config/application.rb

@@ -25,26 +25,3 @@ class Application < Rails::Application
     config.active_record.raise_in_transactional_callbacks = true
   end
 end
-
-# in config/application.rb, before the application loads
-class ActiveRecordOverrideRailtie < Rails::Railtie
-  initializer "active_record.initialize_database.override" do |app|
-
-    ActiveSupport.on_load(:active_record) do
-      if url = ENV['DATABASE_URL']
-        ActiveRecord::Base.connection_pool.disconnect!
-        parsed_url = URI.parse(url)
-        config =  {
-          adapter:             'postgis',
-          host:                parsed_url.host,
-          encoding:            'unicode',
-          database:            parsed_url.path.split("/")[-1],
-          port:                parsed_url.port,
-          username:            parsed_url.user,
-          password:            parsed_url.password
-        }
-        establish_connection(config)
-      end
-    end
-  end
-end