Do I still need to do this even though I have removed default configuration?

I have removed the default configuration before we put our configuration on the device. Would I still need to remove it from the switch/bridge?

I have a small issue that I cannot seem to find a fix for: We have a RB2011UiAS-2HnD-IN, configured as follows: ether1 - DHCP WAN ether2 - Assigned IP 10.50.5.1/24 - (Local Network really only used for a local technician to connect to device should we not be able to connect remotely) ether3-10 - Dis...