Remove test exclusion (#91253)

When this exclusion merged in #89421, the issue was already fixed.

Author: MichalStrehovsky

src/tests/JIT/opt/Devirtualization/Comparer_get_Default.csproj

@@ -1,9 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Optimize>True</Optimize>
-
-    <!-- https://github.com/dotnet/runtime/issues/89918 -->
-    <NativeAotIncompatible>true</NativeAotIncompatible>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Comparer_get_Default.cs" />