docs: remove the Selleo logo from the who-uses section

Author: simon2k

content/discover/who-uses.json

@@ -186,11 +186,6 @@
       "logo": "/assets/logo/rivvy.png",
       "url": "https://rivvy.app",
       "width": "120px"
-    },
-    {
-      "logo": "/assets/logo/selleo.png",
-      "url": "https://selleo.com",
-      "width": "130px"
     }
   ],
   "Body": [