fix!: remove pubsub #4838

Job	Run time
Build	4m 1s
Test example js-libp2p-example-browser-pubsub	3m 40s
Test example js-libp2p-example-connection-encryption	1m 41s
Test example js-libp2p-example-chat	5m 52s
Test example js-libp2p-example-circuit-relay	3m 7s
Test example js-libp2p-example-custom-protocols	1m 5s
Test example js-libp2p-example-peer-and-content-routing	3m 18s
Test example js-libp2p-example-delegated-routing	4m 9s
Test example js-libp2p-example-discovery-mechanisms	3m 43s
Test example js-libp2p-example-pnet	1m 46s
Test example js-libp2p-example-transports	2m 51s
Test example js-libp2p-example-webrtc-private-to-private	2m 16s
Test example js-libp2p-example-pubsub	1m 5s
Test example js-libp2p-example-protocol-and-stream-muxing	1m 31s
	40m 5s

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