Remove environment flag from graph (#8099)

# Description
As the environment flag has no impact on `app graph` the best option is
to remove.

## Type of change
- This pull request fixes a bug in Radius and has an approved issue
(issue link required).

Fixes: #7507

Signed-off-by: Garry Taylor <[email protected]>
Co-authored-by: Yetkin Timocin <[email protected]>

pkg/cli/cmd/app/graph/graph.go

@@ -16,7 +16,6 @@ import (
 	"github.com/radius-project/radius/pkg/cli/framework"
 	"github.com/radius-project/radius/pkg/cli/output"
 	"github.com/radius-project/radius/pkg/cli/workspaces"
-	"github.com/radius-project/radius/pkg/ucp/resources"
 	"github.com/spf13/cobra"
 )
 
@@ -39,7 +38,6 @@ rad app graph my-application`,
 
 	commonflags.AddWorkspaceFlag(cmd)
 	commonflags.AddResourceGroupFlag(cmd)
-	commonflags.AddEnvironmentNameFlag(cmd)
 	commonflags.AddApplicationNameFlag(cmd)
 
 	return cmd, runner
@@ -52,7 +50,6 @@ type Runner struct {
 	Output            output.Interface
 
 	ApplicationName string
-	EnvironmentName string
 	Workspace       *workspaces.Workspace
 }
 
@@ -89,20 +86,13 @@ func (r *Runner) Validate(cmd *cobra.Command, args []string) error {
 	}
 
 	// Validate that the application exists
-	app, err := client.GetApplication(cmd.Context(), r.ApplicationName)
+	_, err = client.GetApplication(cmd.Context(), r.ApplicationName)
 	if clients.Is404Error(err) {
 		return clierrors.Message("Application %q does not exist or has been deleted.", r.ApplicationName)
 	} else if err != nil {
 		return err
 	}
 
-	parsed, err := resources.ParseResource(*app.Properties.Environment)
-	if err != nil {
-		return err
-	}
-
-	r.EnvironmentName = parsed.Name()
-
 	return nil
 }
 

pkg/cli/cmd/app/graph/graph_test.go

@@ -58,7 +58,6 @@ func Test_Validate(t *testing.T) {
 				runner := r.(*Runner)
 				// These values are used by Run()
 				require.Equal(t, "test-app", runner.ApplicationName)
-				require.Equal(t, "test-env", runner.EnvironmentName)
 			},
 		},
 		{
@@ -79,7 +78,6 @@ func Test_Validate(t *testing.T) {
 				runner := r.(*Runner)
 				// These values are used by Run()
 				require.Equal(t, "test-app", runner.ApplicationName)
-				require.Equal(t, "test-env", runner.EnvironmentName)
 			},
 		},
 		{
@@ -181,7 +179,6 @@ func Test_Run(t *testing.T) {
 
 		// Populated by Validate()
 		ApplicationName: "test-app",
-		EnvironmentName: "test-env",
 	}
 
 	err := runner.Run(context.Background())