[shimmie2] remove 'loudbooru.com'

docs/supportedsites.md

@@ -1369,12 +1369,6 @@ Consider all listed sites to potentially be NSFW.
 <tr>
     <td colspan="4"><strong>Shimmie2 Instances</strong></td>
 </tr>
-<tr>
-    <td>Loudbooru</td>
-    <td>https://loudbooru.com/</td>
-    <td>Posts, Tag Searches</td>
-    <td></td>
-</tr>
 <tr>
     <td>Giantessbooru</td>
     <td>https://sizechangebooru.com/</td>