fix(compose): remove unnecessary warning validating deploy.mode that is error

pkg/client/compose/project_test.go

@@ -345,19 +345,7 @@ configs:
 			warnContains: []string{"container_name"},
 		},
 		{
-			name: "deploy mode",
-			composeYAML: `services:
-  app:
-    image: myapp:latest
-    deploy:
-      mode: replicated-job
-      replicas: 2
-`,
-			warnCount:    1,
-			warnContains: []string{"deploy mode must"},
-		},
-		{
-			name: "deploy mode",
+			name: "deploy labels",
 			composeYAML: `services:
   app:
     image: myapp:latest

pkg/client/compose/service.go

@@ -502,7 +502,8 @@ func validateServicesFeatures(project *types.Project) []error {
 			errs = append(errs, err(service.Name, "container_name"))
 		}
 		if service.Deploy != nil {
-			if len(service.Deploy.Placement.Constraints) > 0 || len(service.Deploy.Placement.Preferences) > 0 {
+			if len(service.Deploy.Placement.Constraints) > 0 || len(service.Deploy.Placement.Preferences) > 0 ||
+				service.Deploy.Placement.MaxReplicas > 0 {
 				errs = append(errs, fmt.Errorf(
 					"service '%s': deploy placement is not supported, "+
 						"use x-machines instead: %s", service.Name,
@@ -513,10 +514,6 @@ func validateServicesFeatures(project *types.Project) []error {
 				errs = append(errs, fmt.Errorf(
 					"service '%s': deploy restart_policy defaults to 'unless-stopped'", service.Name))
 			}
-			if service.Deploy.Mode != "" && service.Deploy.Mode != "global" && service.Deploy.Mode != "replicated" {
-				errs = append(errs, fmt.Errorf(
-					"service '%s': deploy mode must either be 'global' or 'replicated'", service.Name))
-			}
 			if service.Deploy.RollbackConfig != nil {
 				errs = append(errs, err(service.Name, "deploy rollback_config"))
 			}