interop: fix linter issues

Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>

Author: AnnaShaleva

pkg/interop/native/ledger/transaction_signer.go

@@ -88,7 +88,7 @@ type WitnessCondition struct {
 // WitnessConditionType represents the type of rule-based witness condition.
 type WitnessConditionType byte
 
-// Various witness condition types
+// Various witness condition types.
 const (
 	// WitnessBoolean is a generic boolean condition.
 	WitnessBoolean WitnessConditionType = 0x00

pkg/interop/native/neo/neo.go

@@ -130,5 +130,4 @@ func GetAccountState(addr interop.Hash160) *AccountState {
 // GetCommitteeAddress represents `getCommitteeAddress` method of NEO native contract.
 func GetCommitteeAddress() interop.Hash160 {
 	return neogointernal.CallWithToken(Hash, "getCommitteeAddress", int(contract.ReadStates)).(interop.Hash160)
-
 }