[FAB-3704]Remove unused vars in ./common/

https://jira.hyperledger.org/browse/FAB-3704



Change-Id: If7a690c5276d0881b0fb5b9e6d526896870a6985
Signed-off-by: grapebaba <281165273@qq.com>

common/cauthdsl/cauthdsl_test.go

@@ -93,10 +93,6 @@ func toSignedData(data [][]byte, identities [][]byte, signatures [][]byte) ([]*c
 type mockDeserializer struct {
 }
 
-func NewMockDeserializer() msp.IdentityDeserializer {
-	return &mockDeserializer{}
-}
-
 func (md *mockDeserializer) DeserializeIdentity(serializedIdentity []byte) (msp.Identity, error) {
 	return &mockIdentity{idBytes: serializedIdentity}, nil
 }

common/errors/errors.go

@@ -22,15 +22,12 @@ import (
 	"fmt"
 	"regexp"
 	"runtime"
-
-	logging "github.com/op/go-logging"
 )
 
 // MaxCallStackLength is the maximum length of the stored call stack
 const MaxCallStackLength = 30
 
 var (
-	errorLogger      = logging.MustGetLogger("error")
 	componentPattern = "[A-Za-z]{3}"
 	reasonPattern    = "[0-9]{3}"
 )

common/genesis/genesis.go

@@ -27,8 +27,7 @@ const (
 	msgVersion = int32(1)
 
 	// These values are fixed for the genesis block.
-	lastModified = 0
-	epoch        = 0
+	epoch = 0
 )
 
 // Factory facilitates the creation of genesis blocks.

common/ledger/blkstorage/fsblkstorage/blockfile_mgr.go

@@ -42,11 +42,6 @@ var (
 	blkMgrInfoKey = []byte("blkMgrInfo")
 )
 
-type conf struct {
-	blockfilesDir    string
-	maxBlockfileSize int
-}
-
 type blockfileMgr struct {
 	rootDir           string
 	conf              *Conf