Remove beta messages in Docker & Kubernetes autodiscover providers (e…

…lastic#16760)

We already released this as GA, so these messages were actually outdated

libbeat/autodiscover/providers/docker/docker.go

@@ -31,7 +31,6 @@ import (
 	"github.com/elastic/beats/v7/libbeat/autodiscover/template"
 	"github.com/elastic/beats/v7/libbeat/common"
 	"github.com/elastic/beats/v7/libbeat/common/bus"
-	"github.com/elastic/beats/v7/libbeat/common/cfgwarn"
 	"github.com/elastic/beats/v7/libbeat/common/docker"
 	"github.com/elastic/beats/v7/libbeat/common/safemapstr"
 	"github.com/elastic/beats/v7/libbeat/logp"
@@ -62,8 +61,6 @@ type Provider struct {
 func AutodiscoverBuilder(bus bus.Bus, uuid uuid.UUID, c *common.Config) (autodiscover.Provider, error) {
 	logger := logp.NewLogger("docker")
 
-	cfgwarn.Beta("The docker autodiscover is beta")
-
 	errWrap := func(err error) error {
 		return errors.Wrap(err, "error setting up docker autodiscover provider")
 	}

libbeat/autodiscover/providers/kubernetes/kubernetes.go

@@ -29,7 +29,6 @@ import (
 	"github.com/elastic/beats/v7/libbeat/autodiscover/template"
 	"github.com/elastic/beats/v7/libbeat/common"
 	"github.com/elastic/beats/v7/libbeat/common/bus"
-	"github.com/elastic/beats/v7/libbeat/common/cfgwarn"
 	"github.com/elastic/beats/v7/libbeat/common/kubernetes"
 	"github.com/elastic/beats/v7/libbeat/logp"
 )
@@ -59,7 +58,6 @@ type Provider struct {
 
 // AutodiscoverBuilder builds and returns an autodiscover provider
 func AutodiscoverBuilder(bus bus.Bus, uuid uuid.UUID, c *common.Config) (autodiscover.Provider, error) {
-	cfgwarn.Beta("The kubernetes autodiscover is beta")
 	logger := logp.NewLogger("autodiscover")
 
 	errWrap := func(err error) error {