resourceloader: Remove irrelevant properties from FileModule hash

resourceloader: Remove irrelevant properties from FileModule hash

These properties don't affect the module response. They are either
only consumed by OutputPage, or provided by the startup module
directly, which detects its own changes.

Changes to these properties should not invalidate module cache for
these properties.

Follows-up 2f30ff7a8613f87 which added a hook to getDependencies()
but still included the raw 'dependencies' in the definition summary.
But as it turns out, dependencies don't need to be included.

Change-Id: I468e6a6edc352d845dc7a5d06b0ae2a6d809700b