Removed rubysl from the Gemfile.
Removed rubysl from the Gemfile.

This hasn't been required anymore since quite a while. Starting with 2.2.0 (if I
remember correctly) Rubinius takes care of ensuring the rubysl Gems are always
available, with or without Bundler.

rspec/rspec-mocks,telekomatrix/rspec-mocks,maclover7/rspec-mocks,edwardpark/rspec-mocks,rwz/rspec-mocks,rspec/rspec-mocks,telekomatrix/rspec-mocks,maclover7/rspec-mocks,ducthanh/rspec-mocks,ducthanh/rspec-mocks,edwardpark/rspec-mocks,h4ck3rm1k3/rspec-mocks,rwz/rspec-mocks,h4ck3rm1k3/rspec-mocks,zephyr-dev/rspec-mocks,AEgan/rspec-mocks,zephyr-dev/rspec-mocks,AEgan/rspec-mocks