Tidy up dependencies

Signed-off-by: Jay Guo <[email protected]>

go.mod

@@ -4,24 +4,27 @@ go 1.12
 
 require (
 	github.com/Shopify/sarama v1.23.1 // indirect
-	github.com/fsouza/go-dockerclient v1.4.4 // indirect
 	github.com/gogo/protobuf v1.2.1
 	github.com/golang/protobuf v1.4.2
 	github.com/hashicorp/go-version v1.2.0 // indirect
 	github.com/hyperledger/fabric v2.0.1+incompatible
 	github.com/hyperledger/fabric-amcl v0.0.0-20200128223036-d1aa2665426a // indirect
 	github.com/hyperledger/fabric-protos-go v0.0.0-20200424173316-dd554ba3746e
-	github.com/hyperledger/fabric-samples/commercial-paper/organization/digibank/contract-go v0.0.0-20200610124333-7b2dcbf2edc1 // indirect
 	github.com/hyperledger/fabric-sdk-go v1.0.0-beta1.0.20200317135226-e71412ff3db1
+	github.com/kr/pretty v0.2.0 // indirect
 	github.com/miekg/pkcs11 v1.0.3 // indirect
 	github.com/onsi/ginkgo v1.13.0
 	github.com/onsi/gomega v1.10.1
-	github.com/op/go-logging v0.0.0-20160315200505-970db520ece7 // indirect
 	github.com/pkg/errors v0.8.1
 	github.com/sirupsen/logrus v1.6.0
 	github.com/spf13/viper v1.4.0 // indirect
-	github.com/stretchr/testify v1.5.1
+	github.com/stretchr/objx v0.2.0 // indirect
+	github.com/stretchr/testify v1.5.1 // indirect
 	github.com/sykesm/zap-logfmt v0.0.2 // indirect
+	golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4 // indirect
 	golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1 // indirect
+	google.golang.org/genproto v0.0.0-20191028173616-919d9bdd9fe6 // indirect
+	google.golang.org/grpc v1.24.0 // indirect
+	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 	gopkg.in/jcmturner/goidentity.v3 v3.0.0 // indirect
 )