[pallet-revive] Remove js examples #21630

Job	Run time
isdraft / isdraft	1s
check-dependency-rules	7s
check-workspace	25s
check-markdown	15s
check-fail-ci	16s
check-readme	3m 11s
preflight / preflight	45s
preflight / ci-versions	59s
check-rust-feature-propagation	2m 5s
fmt	1m 9s
test-rust-features	2m 2s
check-toml-format	1m 18s
check-umbrella	2m 11s
All quick checks passed	1s
	14m 45s

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