You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: delete_service.rb
    path of file: ./repos/gitlabhq/app/services/branches
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Branches
  class DeleteService < BaseService
    def execute(branch_name)
      r
    
    def execute(branch_name)
      repository = project.repository
      branch = repository.find_branch(branch_name)

      unless current_user.can?(:push_code, project)
        return ServiceResponse.error(
          message: 'You dont have push access to repo',
          http_status: 405)
      end

      unless branch
        return ServiceResponse.error(
          message: 'No such branch',
          http_status: 404)
      end