This file is meant to be a unique identifier for a project and is generated automatically in new (Meteor) projects. Since VulcanJS is instead cloned as a boilerplate for a new application, this is less ideal since each project receives the same unique identifier. The reason this is not ideal is explained within the comment of the removed file:
e634907530/.meteor/.id
Most importantly, this affects the ability to see any sort of traction on `vulcan:*` packages in Atmosphere since they are aggregated together. This means that 10 or 1000 installs might just be tracked as 1!