Cleanup out of date code

Author: Andrew Omondi

src/Microsoft.Graph.Core/Microsoft.Graph.Core.csproj

@@ -38,7 +38,7 @@
     <EnableNETAnalyzers>True</EnableNETAnalyzers>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <NoWarn>NU5048;NETSDK1202</NoWarn>
-    <IsTrimmable>true</IsTrimmable>
+    <IsTrimmable Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)','net5.0'))">true</IsTrimmable>
   </PropertyGroup>
   <!-- https://github.com/clairernovotny/DeterministicBuilds#deterministic-builds -->
   <PropertyGroup Condition="'$(TF_BUILD)' == 'true'">

src/Microsoft.Graph.Core/Requests/GraphClientFactory.cs

@@ -170,20 +170,6 @@ internal static (HttpMessageHandler Pipeline, FeatureFlag FeatureFlags) CreatePi
                     throw new ArgumentNullException(nameof(handlers), "DelegatingHandler array contains null item.");
                 }
 
-#if IOS || MACOS || MACCATALYST
-#if IOS || MACCATALYST
-                // Skip CompressionHandler since NSUrlSessionHandler automatically handles decompression on iOS and macOS and it can't be turned off.
-                // See issue https://github.com/microsoftgraph/msgraph-sdk-dotnet/issues/481 for more details.
-                if (finalHandler.GetType().Equals(typeof(NSUrlSessionHandler)) && handler.GetType().Equals(typeof(CompressionHandler)))
-#elif MACOS
-                if (finalHandler.GetType().Equals(typeof(Foundation.NSUrlSessionHandler)) && handler.GetType().Equals(typeof(CompressionHandler)))
-#endif
-                {
-                    // Skip chaining of CompressionHandler.
-                    continue;
-                }
-#endif
-
                 // Check for duplicate handler by type.
                 if (!existingHandlerTypes.Add(handler.GetType()))
                 {