n-api: simplify uv_idle wrangling
uv_idle_init(), uv_idle_start() and uv_idle_stop() always succeed. Remove the superfluous error handling.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
uv_idle_init(), uv_idle_start() and uv_idle_stop() always succeed. Remove the superfluous error handling.