Revert "Merge branch 'rails_extra_fix' of github.com:sshaw/padrino_bootstrap_forms into rails_extra_fix"

This reverts commit c7bfd90e3d58650071a10aaa20dc0b113ae22fe0, reversing
changes made to dd67606fb09a4593f1b5f2010f0a60abaf4a0c95.
Revert "Merge branch 'rails_extra_fix' of github.com:sshaw/padrino_bootstrap_forms into rails_extra_fix"

This reverts commit c7bfd90e3d58650071a10aaa20dc0b113ae22fe0, reversing
changes made to d91ebd44179fee8f2225d8b05bf5d47d9ca01c5b.