[mod] yep: fix engine due to new API layout (#6048)

Apparently, YEP no longer supports images and news search.

Also, the naming of the query parameters changed a bit.

Closes: https://github.com/searxng/searxng/issues/6047

searx/settings.yml

@@ -688,22 +688,6 @@ engines:
     engine: yep
     shortcut: yep
     categories: general
-    search_type: web
-    timeout: 15
-    disabled: true
-
-  - name: yep images
-    engine: yep
-    shortcut: yepi
-    categories: images
-    search_type: images
-    disabled: true
-
-  - name: yep news
-    engine: yep
-    shortcut: yepn
-    categories: news
-    search_type: news
     disabled: true
 
   - name: currency