browser: don't reference gulp-ruby-sass
browser: don't reference gulp-ruby-sass

node-sass is now stable, so we can remove code used as a workaround.

dmcassel/marklogic-samplestack,laurelnaiad/marklogic-samplestack,marklogic/marklogic-samplestack,laurelnaiad/marklogic-samplestack,omkarudipi/marklogic-samplestack,dmcassel/marklogic-samplestack,omkarudipi/marklogic-samplestack,marklogic/marklogic-samplestack,ryanjdew/discovery-app-w-samplestack,omkarudipi/marklogic-samplestack,ryanjdew/discovery-app-w-samplestack,laurelnaiad/marklogic-samplestack,marklogic/marklogic-samplestack,dmcassel/marklogic-samplestack,omkarudipi/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,ryanjdew/discovery-app-w-samplestack,supriyantomaftuh/marklogic-samplestack,laurelnaiad/marklogic-samplestack,marklogic/marklogic-samplestack,ryanjdew/discovery-app-w-samplestack,supriyantomaftuh/marklogic-samplestack,dmcassel/marklogic-samplestack