Remove stale '--force' message from interactive clean preview

The non-force mode now uses an interactive confirmation prompt instead of
being a pure dry-run. The old 'Run with --force to delete these items.'
message was contradictory when shown right before the confirmation dialog.

Remove the stale message and update the test to verify it's no longer present.

Author: cursoragent

cmd/entire/cli/clean.go

@@ -246,7 +246,6 @@ func runCleanWithItems(ctx context.Context, w io.Writer, force bool, items []str
 			fmt.Fprintln(w)
 		}
 
-		fmt.Fprintln(w, "Run with --force to delete these items.")
 		return nil
 	}
 

cmd/entire/cli/clean_test.go

@@ -143,9 +143,9 @@ func TestRunClean_PreviewMode(t *testing.T) {
 		t.Errorf("Should not list '%s', got: %s", paths.MetadataBranchName, output)
 	}
 
-	// Should prompt to use --force
-	if !strings.Contains(output, "--force") {
-		t.Errorf("Expected '--force' prompt in output, got: %s", output)
+	// Should NOT contain stale --force message (interactive prompt handles confirmation)
+	if strings.Contains(output, "--force") {
+		t.Errorf("Should not contain '--force' message in interactive mode, got: %s", output)
 	}
 
 	// Branches should still exist (preview mode doesn't delete)