Remove error_notification_id configuration

CHANGELOG.md

@@ -9,9 +9,6 @@
   * `simple_form_for` allows default options for its inputs `:defaults => {}`.
   * Add `readonly` as option of input method. ([@Untainted123](https://github.com/Untainted123))
   * `simple_fields_for` for inherits wrapper option form the form builder. ([@nashby](https://github.com/nashby))
-  * Deprecated part of the old configuration API in favor of the wrapper API which allows you to customize your inputs
-    in a more flexible way. See [this guide](https://github.com/plataformatec/simple_form/wiki/Upgrading-to-Simple-Form-2.0)
-    to know how upgrade.
   * Use action prefix in the form css class. Closes [#360](https://github.com/plataformatec/simple_form/issues/360).
     This is not backward compatible with the previous versions of SimpleForm.
     For more informations see [this comment](https://github.com/plataformatec/simple_form/issues/360#issuecomment-3000780).
@@ -34,11 +31,15 @@
   * Add `item_wrapper_class` configuration option for collection radio buttons / check boxes inputs.
 
 ### deprecation
+  * Deprecate part of the old configuration API in favor of the wrapper API which allows you to customize your inputs
+    in a more flexible way. See [this guide](https://github.com/plataformatec/simple_form/wiki/Upgrading-to-Simple-Form-2.0)
+    to know how upgrade.
   * Deprecate the `translate` configuration in favor of `translate_labels`
   * Deprecate the `html5` configuration in favor of a new `html5` component
   * Deprecate `:radio` input type in favor of `:radio_buttons`
   * Deprecate `collection_radio` form helper in favor of `collection_radio_buttons`
     (the label class has changed as well)
+  * Remove `error_notification_id` configuration
 
 ### bug fix
   * Fix i18n lookup with attributes with same name of models.

lib/simple_form.rb

@@ -29,10 +29,6 @@ module SimpleForm
   mattr_accessor :error_notification_class
   @@error_notification_class = :error_notification
 
-  # ID to add for error notification helper.
-  mattr_accessor :error_notification_id
-  @@error_notification_id = nil
-
   # Series of attemps to detect a default label method for collection.
   mattr_accessor :collection_label_methods
   @@collection_label_methods = [ :to_label, :name, :title, :to_s ]
@@ -175,7 +171,7 @@ module SimpleForm
 
   ## SETUP
 
-  DEPRECATED = %w(hint_tag hint_class error_tag error_class wrapper_tag wrapper_class wrapper_error_class components html5)
+  DEPRECATED = %w(hint_tag hint_class error_tag error_class error_notification_id wrapper_tag wrapper_class wrapper_error_class components html5)
   @@deprecated = []
 
   DEPRECATED.each do |method|

lib/simple_form/error_notification.rb

@@ -34,7 +34,6 @@ module SimpleForm
 
     def html_options
       @options[:class] = "#{SimpleForm.error_notification_class} #{@options[:class]}".strip
-      @options[:id] = SimpleForm.error_notification_id if SimpleForm.error_notification_id
       @options
     end