Lose the Rear view, viewer? well, er- no unless you are going to remove the APIM (Display) you can yank out the Sync unit, but the vehicle will lite just about every dash light it's able to send power to - but it is only to let you know that it's confused...
A Radio "delete" you'd have to remove most of the console to get at that head radio unit - it's communication is done thru the SYNC unit under the Glovebox.
The APIM is the Accessory Protocol Interface Module - uses SYNC heavily to give you information on vehicle and even communicate to the radio and it's own features - it's the display head so when you "delete" a radio you'll need to keep the Console so you can still navigate - if it will let you.
Body control module and SRS - even the POD display might become erratic in operation because the SYNC holds and interprets and uses the APIM to display key information - it communicates with nearly every portion of the car connected to the CAN/OBD-II USB Asynchronous interface ...your Gauge Pods, the Dashboard - and includes ABS, SRS even the TPMS (Tire Pressure Monitor System)
Sure you can remove the Radio but it will come at a price...Delete the SYNC - then you WILL lose your Rear Cam display from the APIM