Remove unused variables and functions #92

Job	Run time
Basic Checks	3m 22s
Unit Tests	5m 46s
Integration Tests (raft)	11m 26s
Integration Tests (pvtdata)	10m 29s
Integration Tests (pvtdatapurge)	4m 48s
Integration Tests (ledger)	11m 46s
Integration Tests (lifecycle)	4m 3s
Integration Tests (e2e smartbft)	19m 43s
Integration Tests (discovery gossip devmode pluggable)	5m 26s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	16m 14s
Integration Tests (sbe nwo msp)	6m 46s
	1h 39m 49s

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