Simplify conditional expression

Emby.Server.Implementations/Dto/DtoService.cs

@@ -571,9 +571,7 @@ namespace Emby.Server.Implementations.Dto
                         return null;
                     }
                 }).Where(i => i is not null)
-                .Where(i => user is null ?
-                    true :
-                    i.IsVisible(user))
+                .Where(i => user is null || i.IsVisible(user))
                 .DistinctBy(x => x.Name, StringComparer.OrdinalIgnoreCase)
                 .ToDictionary(i => i.Name, StringComparer.OrdinalIgnoreCase);
 

Emby.Server.Implementations/Library/LibraryManager.cs

@@ -2749,9 +2749,7 @@ namespace Emby.Server.Implementations.Library
                 }
             })
             .Where(i => i is not null)
-            .Where(i => query.User is null ?
-                true :
-                i.IsVisible(query.User))
+            .Where(i => query.User is null || i.IsVisible(query.User))
             .ToList();
         }