Gemfile: remove "i18n"
activesupport 3.2.13 requires i18n 0.6.1 explicitly. https://github.com/rails/rails/commit/197b9f4d61260bea9e2a0a4883977e02164a0667
Authored by: tmaruyama 2013-10-29
Parent: [r12242]
Child: [r12244]