interop: drop deprecated util.FromAddress

It still was used in a number of places, surprisingly.

internal/basicchain/testdata/verify/verification_contract.go

@@ -1,6 +1,7 @@
 package verify
 
 import (
+	"github.com/nspcc-dev/neo-go/pkg/interop/lib/address"
 	"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
 	"github.com/nspcc-dev/neo-go/pkg/interop/util"
 )
@@ -9,6 +10,6 @@ import (
 // It returns true iff it is signed by Nhfg3TbpwogLvDGVvAvqyThbsHgoSUKwtn (id-0 private key from testchain).
 func Verify() bool {
 	tx := runtime.GetScriptContainer()
-	addr := util.FromAddress("Nhfg3TbpwogLvDGVvAvqyThbsHgoSUKwtn")
+	addr := address.ToHash160("Nhfg3TbpwogLvDGVvAvqyThbsHgoSUKwtn")
 	return util.Equals(string(tx.Sender), string(addr))
 }