Fix contrast between background and form elements on some pages (#31266)

app/controllers/auth/setup_controller.rb

@@ -5,7 +5,6 @@ class Auth::SetupController < ApplicationController
 
   before_action :authenticate_user!
   before_action :require_unconfirmed_or_pending!
-  before_action :set_body_classes
   before_action :set_user
 
   skip_before_action :require_functional!
@@ -35,10 +34,6 @@ class Auth::SetupController < ApplicationController
     @user = current_user
   end
 
-  def set_body_classes
-    @body_classes = 'lighter'
-  end
-
   def user_params
     params.require(:user).permit(:email)
   end