refactor: remove moonrope but maintain legacy API actions (#2889)

Gemfile

@@ -18,7 +18,6 @@ gem "kaminari"
 gem "klogger-logger"
 gem "konfig-config", "~> 3.0"
 gem "mail"
-gem "moonrope"
 gem "mysql2"
 gem "nifty-utils"
 gem "nilify_blanks"