style(rubocop): Lint/UnusedBlockArgument

app/models/route.rb

@@ -117,7 +117,7 @@ class Route < ApplicationRecord
         if route.save
           seen << route.id
         else
-          route.errors.each do |field, message|
+          route.errors.each do |_, message|
             errors.add :base, message
           end
           raise ActiveRecord::RecordInvalid