chore(backstage): remove unused client.bridge.near #933

Job	Run time
build all rust contracts	17m 4s
test eth-prover	9m 30s
test eth-client	12m 42s
test eth2-client	12m 11s
test eth2near/contract_wrapper	11m 30s
test eth2near/finality-update-verify	10m 2s
test eth2near/eth2-to-near-block-relay-rs	12m 24s
test eth2near/eth2-contract-init	10m 34s
test eth2near/eth_rpc_client	11m 44s
	1h 47m 41s

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