Remove old TODO

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
Avoid sharing variable to turn around a bug in jruby happening on older VM

jruby.getContext().setAttribute("org.jruby.embed.sharing.variables", false, ScriptContext.ENGINE_SCOPE);

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>