Update roadmap.md (#1753)
Update roadmap.md (#1753)

1. Removed completed items.
2. Removed items that are no longer considered top priority.
3. Added queued_retry deprecation as an item.
open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector-contrib,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector-contrib