fix(go): drop removed cloud providers from machine matching (#196)

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: fnwoke-lightning

go/machine.go

@@ -354,11 +354,9 @@ func isCloudProvider(cloud string) bool {
 	switch normalizeCloudProvider(cloud) {
 	case string(models.V1CloudProviderAWS),
 		string(models.V1CloudProviderGCP),
-		string(models.V1CloudProviderVULTR),
 		string(models.V1CloudProviderLAMBDALABS),
 		string(models.V1CloudProviderSLURM),
 		string(models.V1CloudProviderDGX),
-		string(models.V1CloudProviderVOLTAGEPARK),
 		string(models.V1CloudProviderNEBIUS),
 		string(models.V1CloudProviderCLOUDFLARE),
 		string(models.V1CloudProviderLIGHTNING),