In 2017, I wrote:

What if, in places like Somerville where all parking is already by-permit-only, we added a new category of housing unit, one that didn't come with any rights to street parking?

It turns out this was included in the 2019 zoning overhaul (I missed this among all the other great changes):

11.2.7: On-Street Parking in Transit Areas

1. Upon the adoption of an official policy limiting on-street residential parking permits in transit areas, the review boards shall require the following as a condition(s) of any discretionary or administrative permit:
   1. that the applicant complete and file formal acknowledgment that all dwelling unit(s) are ineligible to participate in the Somerville Residential Permit Parking program with the with the Middlesex South Registry of Deeds or Land court prior to the issuance of a building permit;
   2. that all dwelling units are advertised as ineligible to participate in the Somerville Residential Permit Parking program; and
   3. that all buyers grantees, lessees, renters, or tenants are informed that all dwelling unit(s) is ineligible to participate in the Somerville Residential Permit Parking program.

By transit area they mean everything within half a mile from a subway stop, which with the Green Line makes most of the city:

I'm very excited to see this! While housing without parking is not what everyone wants or needs, this change (a) makes it an option for people who do want it and (b) should help reduce opposition to construction.