removes old tag API

src/Umbraco.Core/Models/PropertyTagChange.cs

@@ -1,22 +0,0 @@
-using System;
-using System.Collections.Generic;
-
-namespace Umbraco.Core.Models
-{
-    /// <summary>
-    /// A set of tag changes.
-    /// </summary>
-    internal class PropertyTagChange
-    {
-        public ChangeType Type { get; set; }
-
-        public IEnumerable<(string Type, string Tags)> Tags { get; set; }
-
-        public enum ChangeType
-        {
-            Replace,
-            Remove,
-            Merge
-        }
-    }
-}

src/Umbraco.Core/Umbraco.Core.csproj

@@ -727,7 +727,6 @@
     <Compile Include="Models\PropertyCollection.cs" />
     <Compile Include="Models\PropertyGroup.cs" />
     <Compile Include="Models\PropertyGroupCollection.cs" />
-    <Compile Include="Models\PropertyTagChange.cs" />
     <Compile Include="Models\PropertyType.cs" />
     <Compile Include="Models\PropertyTypeCollection.cs" />
     <Compile Include="Models\PublicAccessEntry.cs" />