Try remove privacy pkg (#466)

* try removing privacy pkg

* rm more reference

* trigger CI

core/vm/contracts.go

@@ -22,8 +22,6 @@ import (
 	"errors"
 	"math/big"
 
-	"github.com/XinFinOrg/XDPoSChain/core/vm/privacy"
-
 	"github.com/XinFinOrg/XDPoSChain/common"
 	"github.com/XinFinOrg/XDPoSChain/common/math"
 	"github.com/XinFinOrg/XDPoSChain/crypto"
@@ -63,8 +61,6 @@ var PrecompiledContractsByzantium = map[common.Address]PrecompiledContract{
 	common.BytesToAddress([]byte{6}):  &bn256AddByzantium{},
 	common.BytesToAddress([]byte{7}):  &bn256ScalarMulByzantium{},
 	common.BytesToAddress([]byte{8}):  &bn256PairingByzantium{},
-	common.BytesToAddress([]byte{30}): &ringSignatureVerifier{},
-	common.BytesToAddress([]byte{40}): &bulletproofVerifier{},
 	common.BytesToAddress([]byte{41}): &XDCxLastPrice{},
 	common.BytesToAddress([]byte{42}): &XDCxEpochPrice{},
 }
@@ -81,8 +77,6 @@ var PrecompiledContractsIstanbul = map[common.Address]PrecompiledContract{
 	common.BytesToAddress([]byte{7}):  &bn256ScalarMulIstanbul{},
 	common.BytesToAddress([]byte{8}):  &bn256PairingIstanbul{},
 	common.BytesToAddress([]byte{9}):  &blake2F{},
-	common.BytesToAddress([]byte{30}): &ringSignatureVerifier{},
-	common.BytesToAddress([]byte{40}): &bulletproofVerifier{},
 	common.BytesToAddress([]byte{41}): &XDCxLastPrice{},
 	common.BytesToAddress([]byte{42}): &XDCxEpochPrice{},
 }
@@ -426,42 +420,6 @@ func runBn256Pairing(input []byte) ([]byte, error) {
 	return false32Byte, nil
 }
 
-type ringSignatureVerifier struct{}
-type bulletproofVerifier struct{}
-
-func (c *bulletproofVerifier) RequiredGas(input []byte) uint64 {
-	//the gas should depends on the ringsize
-	return 100000
-}
-
-func (c *ringSignatureVerifier) RequiredGas(input []byte) uint64 {
-	//the gas should depends on the ringsize
-	return 100000
-}
-
-func (c *ringSignatureVerifier) Run(proof []byte) ([]byte, error) {
-	der, err := privacy.Deserialize(proof)
-	if err != nil {
-		return []byte{}, errors.New("Fail to deserialize proof")
-	}
-	if !privacy.Verify(der, false) {
-		return []byte{}, errors.New("Fail to verify ring signature")
-	}
-	return []byte{}, nil
-}
-
-func (c *bulletproofVerifier) Run(proof []byte) ([]byte, error) {
-	mrp := new(privacy.MultiRangeProof)
-	if mrp.Deserialize(proof) != nil {
-		return []byte{}, errors.New("failed to deserialize bulletproofs")
-	}
-
-	if !privacy.MRPVerify(mrp) {
-		return []byte{}, errors.New("failed to verify bulletproof")
-	}
-	return []byte{}, nil
-}
-
 // bn256PairingIstanbul implements a pairing pre-compile for the bn256 curve
 // conforming to Istanbul consensus rules.
 type bn256PairingIstanbul struct{}
@@ -488,6 +446,7 @@ func (c *bn256PairingByzantium) Run(input []byte) ([]byte, error) {
 	return runBn256Pairing(input)
 }
 
+
 type blake2F struct{}
 
 func (c *blake2F) RequiredGas(input []byte) uint64 {