Remove unrecognized Liquid tag

Author: handsome-feng

themes/landscape/README.md

@@ -74,7 +74,6 @@ Landscape uses [Fancybox] to showcase your photos. You can use Markdown syntax o
 ```
 ![img caption](img url)
 
-{% fancybox img_url [img_thumbnail] [img_caption] %}
 ```
 
 ### Sidebar