Make the parsoidsvc-jslint job more similar to the standard one.

Our custom jslint job had some tweaks to make it more similar to the
standard Parsoid job configuration.  But try to avoid unnecessarily
divergence -- the only thing we really need is for it not to run
json-hint.

Change-Id: I774cc3d2efa66c1f45bbfca6f96b0f87c1aa30b8