remove ruby1.9.3 from vagrant box; unneeded
remove ruby1.9.3 from vagrant box; unneeded

shashidharatd/garden-linux,cloudfoundry-incubator/garden,savaki/garden,cloudfoundry-incubator/garden-linux,tsaleh/garden,cloudfoundry-incubator/garden-linux,cloudfoundry-incubator/garden,shashidharatd/garden-linux,tangfeixiong/garden,tsaleh/garden,cloudfoundry-incubator/garden-linux,tangfeixiong/garden,shashidharatd/garden-linux,savaki/garden,shashidharatd/garden-linux