ruby remove default gem - simeonlam/knowledge GitHub Wiki
https://stackoverflow.com/a/59636874
# I'm running RVM to manage my Ruby versions
~/.rvm/rubies/ruby-2.7.0/lib/ruby/gems/2.7.0/specifications/default/
-rw-r--r-- 1 myuser staff 10731 Dec 26 17:22 bundler-2.1.2.gemspec
-rw-r--r-- 1 myuser staff 15134 Jan 7 17:30 bundler-2.1.4.gemspec
remove unuse gem in ~/.rvm/rubies/ruby-2.7.0/lib/ruby/gems/2.7.0/specifications/default/