attempt to suppress warnings

Author: Andrew Omondi

tests/Microsoft.Graph.DotnetCore.Core.Trimming/Microsoft.Graph.DotnetCore.Core.Trimming.csproj

@@ -10,6 +10,7 @@
         <PublishTrimmed>true</PublishTrimmed>
         <PublishAot>true</PublishAot>
         <NoWarn>IL3000</NoWarn> <!-- Ignore IL3000 warning as it references a code outside our control -->
+        <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
     </PropertyGroup>
     <ItemGroup>
       <ProjectReference Include="..\..\src\Microsoft.Graph.Core\Microsoft.Graph.Core.csproj" />