Remove unused groupBy (#1130)

Fixes #1107

app/Models/User.php

@@ -289,8 +289,7 @@ class User extends Model implements AuthenticatableContract, AuthorizableContrac
             ->leftJoin('subusers', 'subusers.server_id', '=', 'servers.id')
             ->where(function (Builder $builder) {
                 $builder->where('servers.owner_id', $this->id)->orWhere('subusers.user_id', $this->id);
-            })
-            ->groupBy('servers.id');
+            });
     }
 
     public function subusers(): HasMany