remove unused code

internal/autocert/constants.go

@@ -1,8 +1,6 @@
 package autocert
 
 import (
-	"errors"
-
 	"github.com/go-acme/lego/v4/providers/dns/clouddns"
 	"github.com/go-acme/lego/v4/providers/dns/cloudflare"
 	"github.com/go-acme/lego/v4/providers/dns/duckdns"
@@ -31,7 +29,3 @@ var providersGenMap = map[string]ProviderGenerator{
 	ProviderDuckdns:    providerGenerator(duckdns.NewDefaultConfig, duckdns.NewDNSProviderConfig),
 	ProviderOVH:        providerGenerator(ovh.NewDefaultConfig, ovh.NewDNSProviderConfig),
 }
-
-var (
-	ErrGetCertFailure = errors.New("get certificate failed")
-)

internal/autocert/provider.go

@@ -3,6 +3,7 @@ package autocert
 import (
 	"crypto/tls"
 	"crypto/x509"
+	"errors"
 	"os"
 	"path"
 	"reflect"
@@ -35,6 +36,8 @@ type (
 	CertExpiries map[string]time.Time
 )
 
+var ErrGetCertFailure = errors.New("get certificate failed")
+
 func (p *Provider) GetCert(_ *tls.ClientHelloInfo) (*tls.Certificate, error) {
 	if p.tlsCert == nil {
 		return nil, ErrGetCertFailure
@@ -248,10 +251,7 @@ func (p *Provider) renewIfNeeded() E.Error {
 		return nil
 	}
 
-	if err := p.ObtainCert(); err != nil {
-		return err
-	}
-	return nil
+	return p.ObtainCert()
 }
 
 func getCertExpiries(cert *tls.Certificate) (CertExpiries, error) {