code hygiene: rm unused ledger APIs

This CR removes the following three unused APIs
from the ledger interface:
(1) PurgePrivateData()
(2) Prune()
(3) PrivateDataMinBlockNum()

Change-Id: I7383023766d5094fddb2540ef216dbb9ba341e9e
Signed-off-by: senthil <cendhu@gmail.com>

Author: cendhu

core/chaincode/mock/peer_ledger.go

@@ -121,21 +121,6 @@ func (m *mockLedger) GetMissingPvtDataTracker() (ledger2.MissingPvtDataTracker,
 	panic("implement me")
 }
 
-func (m *mockLedger) PurgePrivateData(maxBlockNumToRetain uint64) error {
-	args := m.Called(maxBlockNumToRetain)
-	return args.Error(0)
-}
-
-func (m *mockLedger) PrivateDataMinBlockNum() (uint64, error) {
-	args := m.Called()
-	return args.Get(0).(uint64), args.Error(1)
-}
-
-func (m *mockLedger) Prune(policy ledger.PrunePolicy) error {
-	args := m.Called(policy)
-	return args.Error(0)
-}
-
 func createLedger(channelID string) (*common.Block, *mockLedger) {
 	gb, _ := test.MakeGenesisBlock(channelID)
 	ledger := &mockLedger{

core/committer/committer_test.go

@@ -1569,21 +1569,6 @@ func (m *mockLedger) CommitWithPvtData(pvtDataAndBlock *ledger.BlockAndPvtData)
 	return nil
 }
 
-// PurgePrivateData purges the private data
-func (m *mockLedger) PurgePrivateData(maxBlockNumToRetain uint64) error {
-	return nil
-}
-
-// PrivateDataMinBlockNum returns the lowest retained endorsement block height
-func (m *mockLedger) PrivateDataMinBlockNum() (uint64, error) {
-	return 0, nil
-}
-
-// Prune prune using policy
-func (m *mockLedger) Prune(policy ledger2.PrunePolicy) error {
-	return nil
-}
-
 func (m *mockLedger) GetBlockchainInfo() (*common.BlockchainInfo, error) {
 	args := m.Called()
 	return args.Get(0).(*common.BlockchainInfo), nil

core/committer/txvalidator/v14/validator_test.go

@@ -276,11 +276,6 @@ func (l *kvLedger) GetTxValidationCodeByTxID(txID string) (peer.TxValidationCode
 	return txValidationCode, err
 }
 
-//Prune prunes the blocks/transactions that satisfy the given policy
-func (l *kvLedger) Prune(policy commonledger.PrunePolicy) error {
-	return errors.New("not yet implemented")
-}
-
 // NewTxSimulator returns new `ledger.TxSimulator`
 func (l *kvLedger) NewTxSimulator(txid string) (ledger.TxSimulator, error) {
 	return l.txtmgmt.NewTxSimulator(txid)
@@ -396,18 +391,6 @@ func (l *kvLedger) GetPvtDataByNum(blockNum uint64, filter ledger.PvtNsCollFilte
 	return pvtdata, err
 }
 
-// Purge removes private read-writes set generated by endorsers at block height lesser than
-// a given maxBlockNumToRetain. In other words, Purge only retains private read-write sets
-// that were generated at block height of maxBlockNumToRetain or higher.
-func (l *kvLedger) PurgePrivateData(maxBlockNumToRetain uint64) error {
-	return errors.New("not yet implemented")
-}
-
-// PrivateDataMinBlockNum returns the lowest retained endorsement block height
-func (l *kvLedger) PrivateDataMinBlockNum() (uint64, error) {
-	return 0, errors.New("not yet implemented")
-}
-
 func (l *kvLedger) GetConfigHistoryRetriever() (ledger.ConfigHistoryRetriever, error) {
 	return l.configHistoryRetriever, nil
 }

core/ledger/kvledger/kv_ledger.go

@@ -79,14 +79,6 @@ type PeerLedger interface {
 	GetPvtDataByNum(blockNum uint64, filter PvtNsCollFilter) ([]*TxPvtData, error)
 	// CommitWithPvtData commits the block and the corresponding pvt data in an atomic operation
 	CommitWithPvtData(blockAndPvtdata *BlockAndPvtData) error
-	// Purge removes private read-writes set generated by endorsers at block height lesser than
-	// a given maxBlockNumToRetain. In other words, Purge only retains private read-write sets
-	// that were generated at block height of maxBlockNumToRetain or higher.
-	PurgePrivateData(maxBlockNumToRetain uint64) error
-	// PrivateDataMinBlockNum returns the lowest retained endorsement block height
-	PrivateDataMinBlockNum() (uint64, error)
-	//Prune prunes the blocks/transactions that satisfy the given policy
-	Prune(policy commonledger.PrunePolicy) error
 	// GetConfigHistoryRetriever returns the ConfigHistoryRetriever
 	GetConfigHistoryRetriever() (ConfigHistoryRetriever, error)
 	// CommitPvtDataOfOldBlocks commits the private data corresponding to already committed block