Revert "Merge pull request #120 from strzalek/unneeded-require"

This reverts commit 91e94a681c1838df720dcb35bcb5ef4a5306e455, reversing
changes made to 36b804e9a213b1041aa4ad85884d5c336e502f98.
Rails-api plays nice with Rails 4.1 so test it properly