Update custom sass

resources/assets/sass/custom.scss

@@ -488,10 +488,6 @@ details summary::-webkit-details-marker {
   font-weight: bold;
 }
 
-.notification-tooltip .arrow::before {
-  border-bottom-color:#dc3545 !important;
-}
-
 #previewAvatar {
     img {
         max-width: 100%;