Remove useless addComment and removeComment methods

Author: voronkovich

src/AppBundle/DataFixtures/ORM/PostFixtures.php

@@ -69,7 +69,6 @@ public function load(ObjectManager $manager)
                 $comment->setPost($post);
 
                 $manager->persist($comment);
-                $post->addComment($comment);
             }
 
             $manager->persist($post);

src/AppBundle/Entity/Post.php

@@ -201,17 +201,6 @@ public function getComments()
         return $this->comments;
     }
 
-    public function addComment(Comment $comment)
-    {
-        $this->comments->add($comment);
-        $comment->setPost($this);
-    }
-
-    public function removeComment(Comment $comment)
-    {
-        $this->comments->removeElement($comment);
-    }
-
     public function getSummary()
     {
         return $this->summary;