js: clean up after old codebase
js: clean up after old codebase

Old codebase has some differences in repo organization (prior to moving
js automation out to root).

Remove files that may be left behind when someone pulls code in the
newer branches.

supriyantomaftuh/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,laurelnaiad/marklogic-samplestack,omkarudipi/marklogic-samplestack,laurelnaiad/marklogic-samplestack,dmcassel/marklogic-samplestack,dmcassel/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,marklogic/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,marklogic/marklogic-samplestack,dmcassel/marklogic-samplestack,omkarudipi/marklogic-samplestack,laurelnaiad/marklogic-samplestack,dmcassel/marklogic-samplestack,omkarudipi/marklogic-samplestack,omkarudipi/marklogic-samplestack,marklogic/marklogic-samplestack,laurelnaiad/marklogic-samplestack,marklogic/marklogic-samplestack