[mod] engines: remove livespace engine (#5798)

Related:

- https://github.com/searxng/searxng/pull/3222
- https://web.archive.org/web/20240524174947/https://about.live.space/post/thank-you

searx/settings.yml

@@ -2474,13 +2474,6 @@ engines:
     disabled: true
     inactive: true
 
-  - name: livespace
-    engine: livespace
-    shortcut: ls
-    categories: videos
-    disabled: true
-    timeout: 5.0
-
   - name: wordnik
     engine: wordnik
     shortcut: wnik