Remove 'description' from newsletter templates, it's not used anymore

[MAILPOET-2647]

lib/Entities/NewsletterTemplateEntity.php

@@ -36,12 +36,6 @@ class NewsletterTemplateEntity {
    */
   private $categories = '[]';
 
-  /**
-   * @ORM\Column(type="string")
-   * @var string
-   */
-  private $description = '';
-
   /**
    * @ORM\Column(type="json")
    * @Assert\NotBlank()
@@ -91,14 +85,6 @@ class NewsletterTemplateEntity {
     $this->categories = $categories;
   }
 
-  public function getDescription(): string {
-    return $this->description;
-  }
-
-  public function setDescription(string $description) {
-    $this->description = $description;
-  }
-
   /**
    * @return array|null
    */