These roads are visible in aerial imagery as under construction and are in use by construction vehicles. Some even have clearly visible road markings.

If your navigation software is so broken that it cannot process access=no (this should be actually be access=private), that is not a valid reason to delete objects from OSM.

I have reverted your changeset and made a few other changes.
- the roads to the south of The Boulevard have been changed from highway=proposed + proposed=* to use a lifecycle namespace as proposed:highway=*
- changed access=no to access=private in most cases