T630 - Removing Perc and Disable Enclosure

Hi,

I have a PowerEdge T630 server.
The initial configuration includes a PERC H730 controller and a 16x 2.5" SAS enclosure.
I would like to completely disconnect the enclosure, and the Perc controller if necessary.

For now, after removing the Perc controller or the enclosure, I get an error message when starting the server:
CBL0009 Backplane 1 controller xx is not connected
as well as 
UEFI0116 One or more boot drivers has reported issue.

Is it possible to no longer have these errors, either by removing only the enclosure, or by also removing the Perc controller?

Best regards, Julien.