⚰️ drop support for static content from env

src/newsletter.php

@@ -159,7 +159,7 @@
 			})($path);
 			
 			// add static content
-			return array_merge(self::STATIC_CONTENT, Env::NEWSLETTER_STATIC_CONTENT, $content_from_file);
+			return array_merge(self::STATIC_CONTENT, $content_from_file);
 		}