Service provider and other cleanup

- Removed old 'exposeTranslations' system to instead use new component
 option system.
- Extracted validation rules into their own service provider.
- Cleaned up some formatting/comments in the repos.

app/Entities/Repos/BookRepo.php

@@ -6,11 +6,9 @@ use BookStack\Entities\Book;
 use BookStack\Entities\Managers\TrashCan;
 use BookStack\Exceptions\ImageUploadException;
 use BookStack\Exceptions\NotFoundException;
-use BookStack\Exceptions\NotifyException;
 use BookStack\Facades\Activity;
 use BookStack\Uploads\ImageRepo;
 use Exception;
-use Illuminate\Contracts\Container\BindingResolutionException;
 use Illuminate\Contracts\Pagination\LengthAwarePaginator;
 use Illuminate\Http\UploadedFile;
 use Illuminate\Support\Collection;
@@ -24,7 +22,6 @@ class BookRepo
 
     /**
      * BookRepo constructor.
-     * @param $tagRepo
      */
     public function __construct(BaseRepo $baseRepo, TagRepo $tagRepo, ImageRepo $imageRepo)
     {

app/Entities/Repos/BookshelfRepo.php

@@ -18,7 +18,6 @@ class BookshelfRepo
 
     /**
      * BookshelfRepo constructor.
-     * @param $baseRepo
      */
     public function __construct(BaseRepo $baseRepo)
     {

app/Entities/Repos/PageRepo.php

@@ -11,7 +11,6 @@ use BookStack\Entities\Page;
 use BookStack\Entities\PageRevision;
 use BookStack\Exceptions\MoveOperationException;
 use BookStack\Exceptions\NotFoundException;
-use BookStack\Exceptions\NotifyException;
 use BookStack\Exceptions\PermissionsException;
 use BookStack\Facades\Activity;
 use Exception;