loader: do not initialize two times usb

log_backend_init already initializes usb cdc_acm peripheral

Author: pennam

loader/main.c

@@ -219,9 +219,6 @@ static int loader(const struct shell *sh) {
 		return 0;
 	}
 #elif CONFIG_LOG
-#if !CONFIG_USB_DEVICE_INITIALIZE_AT_BOOT
-	usb_enable(NULL);
-#endif
 	for (int i = 0; i < log_backend_count_get(); i++) {
 		const struct log_backend *backend;
 		backend = log_backend_get(i);