Extract legacy parts of the codebase into its own module

app/controllers/legacy/users_controller.rb

@@ -0,0 +1,16 @@
+module Legacy
+  class UsersController < ApplicationController
+    def show; end
+
+    # private
+    #   # Use callbacks to share common setup or constraints between actions.
+    #   def set_district
+    #     @district = District.find(params[:id])
+    #   end
+    #
+    #   # Never trust parameters from the scary internet, only allow the white list through.
+    #   def district_params
+    #     params.require(:district).permit(:name, :state_id)
+    #   end
+  end
+end