fix!: remove pubsub #4844

Job	Run time
Build	3m 45s
Test example js-libp2p-example-chat	3m 54s
Test example js-libp2p-example-connection-encryption	3m 18s
Test example js-libp2p-example-pubsub	3m 6s
Test example js-libp2p-example-circuit-relay	3m 12s
Test example js-libp2p-example-pnet	3m 1s
Test example js-libp2p-example-webrtc-private-to-private	2m 2s
Test example js-libp2p-example-delegated-routing	4m 55s
Test example js-libp2p-example-transports	2m 47s
Test example js-libp2p-example-peer-and-content-routing	2m 10s
Test example js-libp2p-example-discovery-mechanisms	4m 6s
Test example js-libp2p-example-browser-pubsub	4m 7s
Test example js-libp2p-example-custom-protocols	3m 7s
Test example js-libp2p-example-protocol-and-stream-muxing	2m 58s
	46m 28s

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