update vendor

Signed-off-by: Roland.Ma <rolandma@yunify.com>

vendor/go.etcd.io/etcd/clientv3/client.go

@@ -37,7 +37,6 @@ import (
 	"google.golang.org/grpc/codes"
 	grpccredentials "google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/keepalive"
-	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/status"
 )
 
@@ -397,13 +396,6 @@ func (c *Client) dialWithBalancerCreds(ep string) grpccredentials.TransportCrede
 	return creds
 }
 
-// WithRequireLeader requires client requests to only succeed
-// when the cluster has a leader.
-func WithRequireLeader(ctx context.Context) context.Context {
-	md := metadata.Pairs(rpctypes.MetadataRequireLeaderKey, rpctypes.MetadataHasLeader)
-	return metadata.NewOutgoingContext(ctx, md)
-}
-
 func newClient(cfg *Config) (*Client, error) {
 	if cfg == nil {
 		cfg = &Config{}