Replace patched #dom_id with #dom_target

lib/core_ext/action_view/record_identifier_with_suffix.rb

@@ -1,10 +0,0 @@
-module CoreExt::ActionView::RecordIdentifierWithSuffix
-  # TODO: replace dom_id with dom_target, then remove this override
-  def dom_id(object, prefix = nil, suffix = nil)
-    if suffix
-      "#{super(object, prefix)}#{::ActionView::RecordIdentifier::JOIN}#{suffix}"
-    else
-      super(object, prefix)
-    end
-  end
-end