Revert "[5.8] Make register method in the ServiceProvider as part o…

…f the contract In the laravel/framework#27067 pr was added DeferrableProvider service provider.  This Pr will add pretty the same thing.  In case, if it will be accepted then I will add documentation for this."

This reverts commit f7fc225

LogServiceProvider.php

@@ -3,9 +3,8 @@
 namespace Illuminate\Log;
 
 use Illuminate\Support\ServiceProvider;
-use Illuminate\Contracts\Support\RegistrableProvider;
 
-class LogServiceProvider extends ServiceProvider implements RegistrableProvider
+class LogServiceProvider extends ServiceProvider
 {
     /**
      * Register the service provider.