code: public function delete()
      {
          if ($this->onBeforeDelete() === false) {
              return false;
          }
  
          $resultObject = static::instantiateAdapter()->delete($this->id);
          $result = $resultObject->isSuccess();
  
          $this->setEventErrorsOnFail($resultObject);
          $this->onAfterDelete($result);
          $this->resetEventErrors();
          $this->throwExceptionOnFail($resultObject);
  
          return $result;
      }
docs: Delete model
  
  @return bool
  @throws ExceptionFromBitrix