before trying to remove the physical wireless module
I would take a look at custom firmware
it’s beta only, and runs off a usb stick
you’d also have to do the system edits yourself
WARNING, WARNING
if you do this and mess it up your device will not boot
edit /init file to remove the networking bits
this file is responsible for all primary boot functions
it does 2 things related to networking
1. it inserts the kernel module needed for the wireless module to function.
you can remove or commend out that section so the module is never loaded
2. it starts all networking services, which could also be commented out or removed
either way physically opening the device or modifying the /init script
neither one of them is an ideal solution
the one safeguard you have of using custom firmware
all your edits reside on a usb thumbdrive
simply removing the thumbdrive, will allow the device to boot to a stock unchanged firmware
