Revert "TV Model: add missing "adult" property"

This reverts commit b820c52.

Author: ihsudg

lib/Tmdb/Model/Tv.php

@@ -40,7 +40,6 @@ class Tv extends AbstractModel
      * @var array
      */
     public static $properties = [
-        'adult',
         'backdrop_path',
         'episode_run_time',
         'first_air_date',
@@ -243,10 +242,6 @@ class Tv extends AbstractModel
      * @var GenericCollection
      */
     protected $episodeGroups;
-    /**
-     * @var bool
-     */
-    private $adult = false;
 
     /**
      * Constructor
@@ -1098,20 +1093,4 @@ public function setEpisodeGroups(GenericCollection $episodeGroups): Tv
 
         return $this;
     }
-
-    /**
-     * @return bool
-     */
-    public function getAdult(): bool
-    {
-        return $this->adult;
-    }
-
-    /**
-     * @param bool $adult
-     */
-    public function setAdult(bool $adult): void
-    {
-        $this->adult = $adult;
-    }
 }