how to degooglify a calendar

[NOTE:  I'm crossposting this to the dev mailing list because
I'm imagining that there might be answers only dev folks would
be able to provide.  If you are reading this from the
dev-apps-calendar list and would like to reply please do so on
the support-calendar list so the complete thread will be located
in one spot.]


Hi All,

I'm very unfamiliar with calendar technology.  So if some of the
details/questions I lay out below seem redundant/obvious/etc.
it's only because I'm wanting to make sure I really understand
what's going on and thus hopefully minimize any calendar
configuration mistakes I might make.

I have an .ics file that I created by exporting data from a
Google calendar.  The Google calendar from which I exported this
data also happened to be a calendar to which Lightning was
subscribed.  I no longer want this calendar data in any way
linked to Google so I imported this data into a local-only
calendar.

*Data*
When I opened the above .ics file in an editor I noticed fields
such as "X-GOOGLE-EDITURL:".  When I imported this .ics file
into a new local-only Lightning calendar, were all the
references to Google ignored?  Is there any way that any Google
data might have "snuck" into my new local-only calendar by
importing .ics data from a Google calendar?

*Settings*
If I'm using the same Lightning installation (that previously
contained the Google-subscribed calendar) to import this .ics
data into a local-only calendar (with a new name--different from
the name that was used for the calendar that was subscribed to
this data when it was hosted by Google), are there any settings
in Lightning that might get auto-configured to reference Google
in the local-only calendar due to the fact that there are
references to Google in the imported .ics data set?



Thanks,
david
--
P.S.

After I wrote the above post I realized I could export the data
from the local-only calendar to look for Google references.
Sure enough the "X-GOOGLE-EDITURL:" strings were still present.
Why is this the case?  The Properties -> Location value for this
local-only calendar says "moz-storage-calendar://", shouldn't
this value be the determining factor as to whether or not a
calendar is communicating remotely.  Is it possible that these
"X-GOOGLE-EDITURL:" references to Google in the local-only
calendar are *not* in fact causing Lightning to attempt to
communicate with Google?  I'm leaving the above post unchanged
since it will provide a fuller understanding of the source of my
curiosity (I also don't have time to rewrite it in this moment).

Lastly, how can I generate a verbose Lightning log that will
contain *any* remote communication attempts that Lightning might
make?  This would be a useful way for me to understand what's
going on with a particular calendar.