[rubygems/rubygems] The BUNDLER_SETUP env should also be cleaned up
BUNDLER_SETUP
https://github.com/rubygems/rubygems/commit/47b7e50f64
[rubygems/rubygems] The
BUNDLER_SETUPenv should also be cleaned uphttps://github.com/rubygems/rubygems/commit/47b7e50f64