Revert "Add JRubies to Travis CI config"
Revert "Add JRubies to Travis CI config"

This reverts commit d1300c21281515ad7ff82389b1dcd5afe1bf5bed.

cavi21/Dynamoid,Dynamoid/Dynamoid,cavi21/Dynamoid,BilalBudhani/Dynamoid,BilalBudhani/Dynamoid,dnswus/Dynamoid,dnswus/Dynamoid,philipmw/Dynamoid,philipmw/Dynamoid,Dynamoid/Dynamoid