Turn On ImplicitUsings (#2079)

* Turn on ImplicitUsings

* Fix formatting

* Run linter

bitwarden_license/src/Sso/Program.cs

@@ -1,6 +1,4 @@
 using Bit.Core.Utilities;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Hosting;
 using Serilog;
 using Serilog.Events;