Applied fixes from StyleCI

Author: jenssegers

src/Jenssegers/Mongodb/Auth/DatabaseTokenRepository.php

@@ -1,6 +1,5 @@
 <?php namespace Jenssegers\Mongodb\Auth;
 
-use Carbon\Carbon;
 use MongoDB\BSON\UTCDateTime;
 
 class DatabaseTokenRepository extends \Illuminate\Auth\Passwords\DatabaseTokenRepository {

src/Jenssegers/Mongodb/Eloquent/HybridRelations.php

@@ -3,7 +3,6 @@
 use Illuminate\Database\Eloquent\Relations\MorphMany;
 use Illuminate\Database\Eloquent\Relations\MorphOne;
 use Illuminate\Support\Str;
-use Jenssegers\Mongodb\Eloquent\Model;
 use Jenssegers\Mongodb\Relations\BelongsTo;
 use Jenssegers\Mongodb\Relations\BelongsToMany;
 use Jenssegers\Mongodb\Relations\HasMany;

src/Jenssegers/Mongodb/Eloquent/Model.php

@@ -4,8 +4,6 @@
 use DateTime;
 use Illuminate\Database\Eloquent\Model as BaseModel;
 use Illuminate\Database\Eloquent\Relations\Relation;
-use Jenssegers\Mongodb\Eloquent\Builder;
-use Jenssegers\Mongodb\Eloquent\HybridRelations;
 use Jenssegers\Mongodb\Query\Builder as QueryBuilder;
 use Jenssegers\Mongodb\Relations\EmbedsMany;
 use Jenssegers\Mongodb\Relations\EmbedsOne;