Remove unnecessary closure from JS module

As it so turns out, ResourceLoader already provides closures for JavaScript modules, eliminating the
need for a closure since one is already provided.  Therefore, the self-invoked function code has been
removed, with the enclosed code unchanged. A note has been added in the JS file to explain this to
prevent future goof-ups.

Change-Id: I45b4a110defd9b102adcadbae1215c25e450facf
Merge "Remove unnecessary closure from JS module"