Remove redundant member

src/Avalonia.Controls/Documents/InlineCollection.cs

@@ -111,7 +111,14 @@ namespace Avalonia.Controls.Documents
         /// <param name="text">The to be added text.</param>
         public void Add(string text)
         {
-            AddText(text);
+            if (InlineHost is TextBlock textBlock && !textBlock.HasComplexContent)
+            {
+                textBlock._text += text;
+            }
+            else
+            {
+                Add(new Run(text));
+            }
         }
 
         /// <summary>
@@ -123,18 +130,6 @@ namespace Avalonia.Controls.Documents
             Add(new InlineUIContainer(control));
         }
 
-        internal void AddText(string text)
-        {
-            if (InlineHost is TextBlock textBlock && !textBlock.HasComplexContent)
-            {
-                textBlock._text += text;
-            }
-            else
-            {
-                Add(new Run(text));
-            }
-        }
-
         /// <summary>
         /// Raised when an inline in the collection changes.
         /// </summary>

tests/Avalonia.Controls.UnitTests/TextBlockTests.cs

@@ -166,9 +166,9 @@ namespace Avalonia.Controls.UnitTests
                         }.RegisterInNameScope(scope)
                 );
 
-                target.Inlines!.AddText("123456");
+                target.Inlines!.Add("123456");
                 target.Inlines.Add(new InlineUIContainer(button));
-                target.Inlines.AddText("123456");
+                target.Inlines.Add("123456");
 
                 target.Measure(Size.Infinity);