boards: remove ECM/EEM from default configuration

The board hardware has no network interfaces, although the ECM/EEM class
implementation can provide Ethernet-like functionality and export it to
the host, this is no reason to default to a specific USB class
implementation.We do not make this kind of configuration for other
boards that have a USB device controller. Also, it may not be what a
user expects when using these boards with networking and a USB stack.

Signed-off-by: Johann Fischer <[email protected]>

Author: jfischer-no

boards/blues/swan_r5/Kconfig.defconfig

@@ -9,14 +9,4 @@ config SPI_STM32_INTERRUPT
 	default y
 	depends on SPI
 
-if NETWORKING
-
-config USB_DEVICE_STACK
-	default y
-
-config USB_DEVICE_NETWORK_EEM
-	default y
-
-endif # NETWORKING
-
 endif # BOARD_SWAN_R5

boards/st/nucleo_f412zg/Kconfig.defconfig

@@ -9,14 +9,4 @@ config SPI_STM32_INTERRUPT
 	default y
 	depends on SPI
 
-if NETWORKING
-
-config USB_DEVICE_STACK
-	default y
-
-config USB_DEVICE_NETWORK_EEM
-	default y
-
-endif # NETWORKING
-
 endif # BOARD_NUCLEO_L4R5ZI