[#625] client/netmap: remove intermediate wrapper

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

pkg/morph/client/netmap/new_epoch.go

@@ -6,27 +6,12 @@ import (
 	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
 )
 
-// NewEpochArgs groups the arguments
-// of new epoch invocation call.
-type NewEpochArgs struct {
-	number int64 // new epoch number
-
-	client.InvokePrmOptional
-}
-
-// SetEpochNumber sets the new epoch number.
-func (a *NewEpochArgs) SetEpochNumber(v int64) {
-	a.number = v
-}
-
-// NewEpoch invokes the call of new epoch method
-// of NeoFS Netmap contract.
-func (c *Client) NewEpoch(args NewEpochArgs) error {
+// NewEpoch updates NeoFS epoch number through
+// Netmap contract call.
+func (c *Client) NewEpoch(epoch uint64) error {
 	prm := client.InvokePrm{}
-
 	prm.SetMethod(newEpochMethod)
-	prm.SetArgs(args.number)
-	prm.InvokePrmOptional = args.InvokePrmOptional
+	prm.SetArgs(int64(epoch))
 
 	if err := c.client.Invoke(prm); err != nil {
 		return fmt.Errorf("could not invoke method (%s): %w", newEpochMethod, err)