卸载指定版本 bundle

gem uninstall bundler -v=1.6.2

因为使用rvm 安装的ruby,会提示:
ERROR: While executing gem ... (Gem::InstallError)
bundler is not installed in GEM_HOME, try:
gem uninstall -i /home/vagrant/.rvm/gems/ruby-1.9.3-p545@global bundler
[vagrant@vagrant-centos65 canvas-centos]$ gem uninstall -i /home/vagrant/.rvm/gems/ruby-1.9.3-p545@global bundler
Successfully uninstalled bundler-1.6.2

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