remove version override for v10 packages (#2393)

Co-authored-by: SergeyMenshykh <[email protected]>

Author: stephentoub

dotnet/tests/Microsoft.Agents.AI.Hosting.AzureFunctions.IntegrationTests/Microsoft.Agents.AI.Hosting.AzureFunctions.IntegrationTests.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="ModelContextProtocol" />
-    <PackageReference Include="System.Net.ServerSentEvents" VersionOverride="10.0.0-rc.2.25502.107" />
+    <PackageReference Include="System.Net.ServerSentEvents" />
   </ItemGroup>
 
   <ItemGroup>