Fix jshint warnings in parserTests.js.

Change-Id: I01ed66175bb143befffbc08dc87eab4d636a047c
Remove unused worker.js module.

This apparently used to be part of the round-trip testing server, but is
no longer used.  Further, jshint doesn't like it very much.

Change-Id: Ifaf3394d4189e3856e168d5b595d0c3e03e65a4e
Merge changes Ifaf3394d,I01ed6617

* changes:
  Remove unused worker.js module.
  Fix jshint warnings in parserTests.js.