style(rubocop): Lint/UselessAssignment

app/controllers/ip_pools_controller.rb

@@ -33,7 +33,7 @@ class IPPoolsController < ApplicationController
   def destroy
     @ip_pool.destroy
     redirect_to_with_json :ip_pools, notice: "IP pool has been removed successfully."
-  rescue ActiveRecord::DeleteRestrictionError => e
+  rescue ActiveRecord::DeleteRestrictionError
     redirect_to_with_json [:edit, @ip_pool], alert: "IP pool cannot be removed because it still has associated addresses or servers."
   end