Gem::Uninstaller#remove

# File tmp/rubies/ruby-3.0.5/lib/rubygems/uninstaller.rb, line 241
def remove(spec)
  unless path_ok?(@gem_home, spec) or
         (@user_install and path_ok?(Gem.user_dir, spec))
    e = Gem::GemNotInHomeException.new \
          "Gem '#{spec.full_name}' is not installed in directory #{@gem_home}"
    e.spec = spec

    raise e
  end

  raise Gem::FilePermissionError, spec.base_dir unless
    File.writable?(spec.base_dir)

  safe_delete { FileUtils.rm_r spec.full_gem_path }
  safe_delete { FileUtils.rm_r spec.extension_dir }

  old_platform_name = spec.original_name

  gem = spec.cache_file
  gem = File.join(spec.cache_dir, "#{old_platform_name}.gem") unless
    File.exist? gem

  safe_delete { FileUtils.rm_r gem }

  Gem::RDoc.new(spec).remove

  gemspec = spec.spec_file

  unless File.exist? gemspec
    gemspec = File.join(File.dirname(gemspec), "#{old_platform_name}.gemspec")
  end

  safe_delete { FileUtils.rm_r gemspec }
  announce_deletion_of(spec)

  Gem::Specification.reset
end