Use metrics to display runner statuses instead of status field for EphemeralRunnerSet and AutoscalingRunnerSet

controllers/actions.github.com/utils.go

@@ -1,8 +1,6 @@
 package actionsgithubcom
 
 import (
-	"encoding/json"
-
 	"k8s.io/apimachinery/pkg/util/rand"
 )
 
@@ -27,11 +25,3 @@ func RandStringRunes(n int) string {
 	}
 	return string(b)
 }
-
-func mustJSON(v any) string {
-	val, err := json.Marshal(v)
-	if err != nil {
-		panic(err)
-	}
-	return string(val)
-}