[tools] Revert workaround for dotnet/runtime#45535.

The dotnet/runtime issue in question has been fixed.

Ref: dotnet/runtime#45535
Ref: 39948aa

tools/linker/MonoTouch.Tuner/ListExportedSymbols.cs

@@ -132,13 +132,6 @@ void ProcessMethod (MethodDefinition method)
 
 				case "libSystem.Net.Security.Native":
 				case "System.Net.Security.Native":
-#if NET
-					// tvOS does not ship with System.Net.Security.Native due to https://github.com/dotnet/runtime/issues/45535
-					if (DerivedLinkContext.App.Platform == ApplePlatform.TVOS) {
-						Driver.Log (4, "Did not add native reference to {0} in {1} referenced by {2} in {3}.", pinfo.EntryPoint, pinfo.Module.Name, method.FullName, method.Module.Name);
-						break;
-					}
-#endif
 					addPInvokeSymbol = true;
 					break;