Removed recommendation for markdown captions extension

Author: squidfunk

docs/reference/images.md

@@ -136,21 +136,6 @@ but it's always possible to use the [Markdown in HTML] extension with literal
   </figure>
 </div>
 
-
-Another option is to use [Markdown captions](https://github.com/Evidlo/markdown_captions) extension 
-which converts images with alt text to \<figure\> with \<figcaption\>.
-
-``` html title="Image with caption"
-  ![Image caption](https://dummyimage.com/600x400/){ width="300" }
-```
-
-<div class="result">
-  <figure>
-    <img src="https://dummyimage.com/600x400/f5f5f5/aaaaaa?text=–%20Image%20–" width="300" />
-    <figcaption>Image caption</figcaption>
-  </figure>
-</div>
-
 ### Image lazy-loading
 
 Modern browsers provide [native support for lazy-loading images][lazy-loading]