Update src/TodoApp/TodoApp.csproj

Author: davidfowl

src/TodoApp/TodoApp.csproj

@@ -6,7 +6,6 @@
     <TypeScriptCompileBlocked>true</TypeScriptCompileBlocked>
     <TypeScriptToolsVersion>latest</TypeScriptToolsVersion>
     <UserSecretsId>TodoApp</UserSecretsId>
-    <Nullable>enable</Nullable>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="AspNet.Security.OAuth.GitHub" Version="6.0.0-preview.6.21378.61" />