Fix merge issues

src/Microsoft.MobileBlazorBindings/Elements/Handlers/ContentPropertyHandler.cs

@@ -22,6 +22,11 @@ namespace Microsoft.MobileBlazorBindings.Elements.Handlers
             _parent = (TElementType)parentElement;
         }
 
+        public void Remove()
+        {
+            // Because this Handler is used internally only, this method is no-op.
+        }
+
         void IMauiContainerElementHandler.AddChild(MC.Element child, int physicalSiblingIndex)
         {
             _setPropertyAction(_parent, child);

src/Microsoft.MobileBlazorBindings/Elements/Handlers/DataTemplatePropertyHandler.cs

@@ -28,6 +28,11 @@ namespace Microsoft.MobileBlazorBindings.Elements.Handlers
             _setPropertyAction(parent, dataTemplate);
         }
 
+        public void Remove()
+        {
+            // Because this Handler is used internally only, this method is no-op.
+        }
+
         // Because this is a 'fake' element, all matters related to physical trees
         // should be no-ops.
 

src/Microsoft.MobileBlazorBindings/Elements/Handlers/ListContentPropertyHandler.cs

@@ -23,6 +23,11 @@ namespace Microsoft.MobileBlazorBindings.Elements.Handlers
             _propertyItems = _listPropertyAccessor((TElementType)parentElement);
         }
 
+        public void Remove()
+        {
+            // Because this Handler is used internally only, this method is no-op.
+        }
+
         void IMauiContainerElementHandler.AddChild(MC.Element child, int physicalSiblingIndex)
         {
             if (!(child is TItemType typedChild))