Bluetooth: cleanup configs

[pennam]

Do not merge before testing

[KurtE]

Quick question: I have synced up to the current code. And have noticed that building C33 there are a lot of Config messages.
Many of them associated with Bluetooth, which I am assuming that this PR may address:

Note: on my zephyrproject - zephyr fork which I synced yesterday to the most recent. And many of my zephyr test apps, would fail to build, saying that the USB stuff has been marked obsolete. So I am trying to move it to USB Next. Which the C33 code is currently configured here to use.

In both cases (ArduinoCore-zephyr and my zephyr) I am seeing the config message:

warning: CDC_ACM_DTE_RATE_CALLBACK_SUPPORT (defined at subsys/usb/device/class/Kconfig.cdc:55) was
assigned the value 'y' but got the value 'n'. Check these unsatisfied dependencies: USB_CDC_ACM                                              (=n), USB_DEVICE_STACK (=n). See
http://docs.zephyrproject.org/latest/kconfig.html#CONFIG_CDC_ACM_DTE_RATE_CALLBACK_SUPPORT and/or
look up CDC_ACM_DTE_RATE_CALLBACK_SUPPORT in the menuconfig/guiconfig interface. The Application
Development Primer, Setting Configuration Values, and Kconfig - Tips and Best Practices sections of  the manual might 
be helpful too.                                                                    

My guess is that setting is a hold over from the non NEXT version? Can we just remove or is there a replacement setting
that should be set?

[pennam]

My guess is that setting is a hold over from the non NEXT version?

I agree, and i think it can be removed. I'll spin a test as soon as possible and provide a PR! Thanks.