Remove `im-online` completely (#466) #15

Job	Run time
Extract tasks from matrix	5s
check-migrations (polkadot, polkadot-runtime, relay/polkadot, wss://try-runtime.polkadot.io:443, ...	22m 36s
check-migrations (kusama, staging-kusama-runtime, relay/kusama, wss://try-runtime-kusama.polkadot...	16m 3s
check-migrations (asset-hub-kusama, asset-hub-kusama-runtime, system-parachains/asset-hubs/asset-...	15m 43s
check-migrations (asset-hub-polkadot, asset-hub-polkadot-runtime, system-parachains/asset-hubs/as...	24m 27s
check-migrations (bridge-hub-kusama, bridge-hub-kusama-runtime, system-parachains/bridge-hubs/bri...	12m 25s
check-migrations (bridge-hub-polkadot, bridge-hub-polkadot-runtime, system-parachains/bridge-hubs...	20m 19s
check-migrations (collectives-polkadot, collectives-polkadot-runtime, system-parachains/collectiv...	10m 20s
check-migrations (coretime-kusama, coretime-kusama-runtime, system-parachains/coretime/coretime-k...	10m 5s
check-migrations (coretime-polkadot, coretime-polkadot-runtime, system-parachains/coretime/coreti...	9m 38s
check-migrations (people-kusama, people-kusama-runtime, system-parachains/people/people-kusama, w...	9m 54s
check-migrations (people-polkadot, people-polkadot-runtime, system-parachains/people/people-polka...	9m 22s
check-migrations (encointer-kusama, encointer-kusama-runtime, system-parachains/encointer, wss://...	10m 42s
All migrations passed	1s
	2h 51m 40s

Provide feedback