Remove macros (#15794)

* Remove macros!

* Clean up snippets

* Add migration that deletes all macros

* Review comments

src/Umbraco.Core/Models/PartialView.cs

@@ -9,14 +9,13 @@ namespace Umbraco.Cms.Core.Models;
 [DataContract(IsReference = true)]
 public class PartialView : File, IPartialView
 {
-    public PartialView(PartialViewType viewType, string path)
-        : this(viewType, path, null)
+    public PartialView(string path)
+        : this(path, null)
     {
     }
 
-    public PartialView(PartialViewType viewType, string path, Func<File, string?>? getFileContent)
-        : base(path, getFileContent) =>
-        ViewType = viewType;
-
-    public PartialViewType ViewType { get; set; }
+    public PartialView(string path, Func<File, string?>? getFileContent)
+        : base(path, getFileContent)
+    {
+    }
 }