remove dependency laravelium/feed

Author: samberrry

composer.json

@@ -30,7 +30,6 @@
     ],
     "require": {
         "cviebrock/eloquent-sluggable": "^10.0|^9.0|~8.0|~7.0|~6.0|~4.8|~4.7|~4.6|~4.5",
-        "laravelium/feed": "~2.12.0|~3.0.0|3.1.*|v6.0.*|v7.0.*|v8.0.*",
         "intervention/image": "2.*",
         "laravel/helpers": "^1.3",
         "swisnl/laravel-fulltext": "^0.20.0"