fix: remove dead code

Author: jhrv

internal/ui/components/error.go

@@ -119,27 +119,6 @@ type RolloutLog struct {
 	Lines       []*LogLine `json:"lines"`
 }
 
-type ConfigSource string
-
-const (
-	ConfigSourceGlobal  ConfigSource = "GLOBAL"
-	ConfigSourceEnv     ConfigSource = "ENV"
-	ConfigSourceHelm    ConfigSource = "HELM"
-	ConfigSourceUnknown ConfigSource = "UNKNOWN"
-)
-
-func (e ConfigSource) IsValid() bool {
-	switch e {
-	case ConfigSourceGlobal, ConfigSourceEnv, ConfigSourceHelm, ConfigSourceUnknown:
-		return true
-	}
-	return false
-}
-
-func (e ConfigSource) String() string {
-	return string(e)
-}
-
 type FeatureVersion struct {
 	Version     string
 	Description string