diff --git a/app/components/attachment/edit_component.rb b/app/components/attachment/edit_component.rb
index d21199de5..37d6ffe62 100644
--- a/app/components/attachment/edit_component.rb
+++ b/app/components/attachment/edit_component.rb
@@ -93,7 +93,7 @@ class Attachment::EditComponent < ApplicationComponent
     nil
   end
 
-  def field_name
+  def field_name(object_name = nil, method_name = nil, *method_names, multiple: false, index: nil)
     helpers.field_name(@form_object_name || ActiveModel::Naming.param_key(@attached_file.record), attribute_name)
   end
 
diff --git a/app/helpers/form_tag_helper.rb b/app/helpers/form_tag_helper.rb
deleted file mode 100644
index 68971b454..000000000
--- a/app/helpers/form_tag_helper.rb
+++ /dev/null
@@ -1,39 +0,0 @@
-module FormTagHelper
-  # from Rails 7 ActionView::Helpers::FormTagHelper
-  # https://api.rubyonrails.org/classes/ActionView/Helpers/FormTagHelper.html#method-i-field_id
-  # Should be removed when we upgrade to Rails 7
-  def field_id(object_name, method_name, *suffixes, index: nil, namespace: nil)
-    if object_name.respond_to?(:model_name)
-      object_name = object_name.model_name.singular
-    end
-
-    sanitized_object_name = object_name.to_s.gsub(/\]\[|[^-a-zA-Z0-9:.]/, "_").delete_suffix("_")
-
-    sanitized_method_name = method_name.to_s.delete_suffix("?")
-
-    [
-      namespace,
-      sanitized_object_name.presence,
-      (index unless sanitized_object_name.empty?),
-      sanitized_method_name,
-      *suffixes
-    ].tap(&:compact!).join("_")
-  end
-
-  # from Rails 7 ActionView::Helpers::FormTagHelper
-  # https://api.rubyonrails.org/classes/ActionView/Helpers/FormTagHelper.html#method-i-field_name
-  # Should be removed when we upgrade to Rails 7
-  def field_name(object_name, method_name, *method_names, multiple: false, index: nil)
-    names = method_names.map! { |name| "[#{name}]" }.join
-
-    # a little duplication to construct fewer strings
-    case
-    when object_name.blank?
-      "#{method_name}#{names}#{multiple ? "[]" : ""}"
-    when index
-      "#{object_name}[#{index}][#{method_name}]#{names}#{multiple ? "[]" : ""}"
-    else
-      "#{object_name}[#{method_name}]#{names}#{multiple ? "[]" : ""}"
-    end
-  end
-end