Description

Description:

Adds $unset stage to aggregation and makes it available in pipeline-style update. $unset is an alias for an exclusion aggregation projection, and has the following syntax: {$unset: ["field1", "field2", ...]}

Engineering Ticket Description:

Add a new $unset stage to the aggregation framework which performs much like an exclusion $project

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)