src/Models/D7Model.php
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 $result;
    }
public function delete()
    {
        if ($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;
    }
Delete model

@return bool
@throws ExceptionFromBitrix