Deprecate duplicate `projects_incident_sla_enabled` metric
Deprecate and schedule the removal of the unused usage_activity_by_stage_monthly.monitor.projects_incident_sla_enabled
metric from Monitor Stage Dashboard. This metric is unused and the value is duplicated in usage_activity_by_stage.monitor.projects_incident_sla_enabled
.
More context in this thread: #329056 (comment 561084413)
Here is the guide on how to proceed with deprecate and removing the metric from usage ping.