Remove experimental flag from stage.windowsevent (#4879)

Author: kgeckhart

CHANGELOG.md

@@ -13,6 +13,7 @@ Main (unreleased)
 ### Features
 
 - A new `mimir.alerts.kubernetes` component which discovers `AlertmanagerConfig` Kubernetes resources and loads them into a Mimir instance. (@ptodev)
+- Mark `stage.windowsevent` block in the `loki.process` component as GA. (@kgeckhart)
 
 ### Enhancements
 

internal/component/loki/process/stages/stage.go

@@ -50,11 +50,6 @@ const (
 	StageTypeWindowsEvent           = "windowsevent"
 )
 
-// Add stages that are not GA. Stages that are not specified here are considered GA.
-var stagesUnstable = map[string]featuregate.Stability{
-	StageTypeWindowsEvent: featuregate.StabilityExperimental,
-}
-
 // Processor takes an existing set of labels, timestamp and log entry and returns either a possibly mutated
 // timestamp and log entry
 type Processor interface {
@@ -121,14 +116,6 @@ func toStage(p Processor) Stage {
 	}
 }
 
-func checkFeatureStability(stageName string, minStability featuregate.Stability) error {
-	blockStability, exist := stagesUnstable[stageName]
-	if exist {
-		return featuregate.CheckAllowed(blockStability, minStability, fmt.Sprintf("stage %q", stageName))
-	}
-	return nil
-}
-
 // New creates a new stage for the given type and configuration.
 func New(logger log.Logger, jobName *string, cfg StageConfig, registerer prometheus.Registerer, minStability featuregate.Stability) (Stage, error) {
 	var (
@@ -278,10 +265,6 @@ func New(logger log.Logger, jobName *string, cfg StageConfig, registerer prometh
 		panic(fmt.Sprintf("unreachable; should have decoded into one of the StageConfig fields: %+v", cfg))
 	}
 
-	if err := checkFeatureStability(s.Name(), minStability); err != nil {
-		return nil, err
-	}
-
 	return s, nil
 }
 

internal/component/loki/process/stages/windowsevent_test.go

@@ -228,8 +228,3 @@ func TestWindowsEventValidate(t *testing.T) {
 		})
 	}
 }
-
-func TestWindowsEventStabilityLevel(t *testing.T) {
-	_, err := NewPipeline(log.NewNopLogger(), loadConfig(testWindowsEventMsgDefaults), nil, prometheus.DefaultRegisterer, featuregate.StabilityPublicPreview)
-	require.ErrorContains(t, err, `invalid stage config stage "windowsevent" is at stability level "experimental", which is below the minimum allowed stability level "public-preview". Use --stability.level command-line flag to enable "experimental" features`)
-}