Merge pull request rails#53140 from murny/remove-unused-const-in-bin-setup-file

Remove APP_NAME const as no longer being used in bin/setup

Author: yahonda

railties/lib/rails/generators/rails/app/templates/bin/setup.tt

@@ -1,7 +1,6 @@
 require "fileutils"
 
 APP_ROOT = File.expand_path("..", __dir__)
-APP_NAME = "<%= app_name.dasherize %>"
 
 def system!(*args)
   system(*args, exception: true)