remove unused files; fix typo; remove debugging code

Author: dhalbert

ports/raspberrypi/common-hal/wifi/main.c

@@ -1,4 +1,4 @@
->/*
+/*
  * This file is part of the Micro Python project, http://micropython.org/
  *
  * The MIT License (MIT)

ports/raspberrypi/common-hal/wifi/micropython_embed.mk

@@ -34,15 +34,6 @@ extern const mp_obj_module_t usb_core_module;
 
 void usb_core_exception_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind);
 
-/*#define MP_DEFINE_USB_CORE_EXCEPTION(exc_name, base_name)     \
-    const mp_obj_type_t mp_type_usb_core_##exc_name = { \
-        { &mp_type_type }, \
-        .name = MP_QSTR_##exc_name, \
-        .print = usb_core_exception_print, \
-        .make_new = mp_obj_exception_make_new, \
-        .attr = mp_obj_exception_attr, \
-        .parent = &mp_type_##base_name, \
-        };*/
 #define MP_DEFINE_USB_CORE_EXCEPTION(exc_name, base_name) \
     MP_DEFINE_CONST_OBJ_TYPE(mp_type_usb_core_##exc_name, MP_QSTR_##exc_name, MP_TYPE_FLAG_NONE, \
     make_new, mp_obj_exception_make_new, \