Removing Gems errors

Removing Gems errors

I have 2 versions of rubies using RVM and i am trying to remove all my
gems which in this ruby version 1.8.7-p302, I tried this but got an error
➜ ~ gem list --no-version | xargs gem uninstall -aIx
zsh: correct 'gem' to '.gem' [nyae]? n
ERROR: While executing gem ... (Gem::InstallError)
cannot uninstall, check `gem list -d bundler`
My Gemlist:
➜ ~ gem list
*** LOCAL GEMS ***
bundler (1.3.5)
bundler-unload (1.0.1)
declarative_authorization (0.5.1)
fattr (2.2.1)
i18n (0.4.2)
mysql (2.9.1, 2.8.1)
rack (1.1.6, 1.0.1)
rails (2.3.18, 2.3.5)
rake (10.1.0, 0.8.7)
rubygems-bundler (1.2.2)
rush (0.6.8)
rvm (1.11.3.8)
session (3.1.0)
sqlite3 (1.3.8)