Revert "Update API diff."

This reverts commit 088d8b3220.

api/Avalonia.nupkg.xml

@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- https://learn.microsoft.com/en-us/dotnet/fundamentals/package-validation/diagnostic-ids -->
-<Suppressions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
-  <Suppression>
-    <DiagnosticId>CP0006</DiagnosticId>
-    <Target>M:Avalonia.Controls.Primitives.IPopupHost.TakeFocus</Target>
-    <Left>baseline/netstandard2.0/Avalonia.Controls.dll</Left>
-    <Right>target/netstandard2.0/Avalonia.Controls.dll</Right>
-  </Suppression>
-</Suppressions>