Illuminate\Database\Eloquent\Builder::delete PHP Method

    public function delete()
    {
        if (isset($this->onDelete)) {
            return call_user_func($this->onDelete, $this);
        }
        return $this->toBase()->delete();
    }

 /**
  * Delete one or more model records from the database
  *
  * @return mixed
  */
 public function delete()
 {
     $this->newQuery()->setClauses()->setScopes();
     $result = $this->query->delete();
     $this->unsetClauses();
     return $result;
 }