Upload file without validation

[eluser]dine[/eluser]
Hi all

I want to upload file but without applying the validation of allowed_type.
if I removed code line
$Uploadconfig['allowed_types'] = 'doc|rtf|docx|pdf|odt';

it gives error like you have not mentioned allowed type.

and If i make it blank like
$Uploadconfig['allowed_types'] = '';

The error comes like file type not allowed.
I am not sure about error wordings but error comes.

kindly help me.