check_for_deployment_mode

# File lib/bundler/cli/outdated.rb, line 221
    def check_for_deployment_mode
      return unless Bundler.frozen_bundle?
      suggested_command = if Bundler.settings.locations("frozen")[:global]
        "bundle config --delete frozen"
      elsif Bundler.settings.locations("deployment").keys.&([:global, :local]).any?
        "bundle config --delete deployment"
      else
        "bundle install --no-deployment"
      end
      raise ProductionError, "You are trying to check outdated gems in "          "deployment mode. Run `bundle outdated` elsewhere.\n"          "\nIf this is a development machine, remove the "          "#{Bundler.default_gemfile} freeze"          "\nby running `#{suggested_command}`."
    end