lib/utils: Remove old pyhelp helper, replaced with py/builtinhelp.c.

Ports should no longer use pyhelp_print_obj but instead should define
MICROPY_PY_BUILTINS_HELP to 1 and then specify their help text using
MICROPY_PY_BUILTINS_HELP_TEXT.

lib/utils/pyhelp.c

-/*
- * This file is part of the MicroPython project, http://micropython.org/
- *
- * The MIT License (MIT)
- *
- * Copyright (c) 2013-2016 Damien P. George
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include <stdio.h>
-
-#include "lib/utils/pyhelp.h"
-
-STATIC void pyhelp_print_info_about_object(mp_obj_t name_o, mp_obj_t value) {
-    mp_printf(MP_PYTHON_PRINTER, "  ");
-    mp_obj_print(name_o, PRINT_STR);
-    mp_printf(MP_PYTHON_PRINTER, " -- ");
-    mp_obj_print(value, PRINT_STR);
-    mp_printf(MP_PYTHON_PRINTER, "\n");
-}
-
-// Helper for 1-argument form of builtin help
-//
-// Typically a port will define a help function thus:
-//
-// STATIC const char *const myport_help_text =
-// "Welcome to MicroPython!\n"
-// "\n"
-// "...information specific to this port e.g. modules available...";
-//
-// STATIC mp_obj_t myport_help(mp_uint_t n_args, const mp_obj_t *args) {
-//     if (n_args == 0) {
-//         printf("%s", myport_help_text);
-//     } else {
-//         pyhelp_print_obj(args[0]);
-//     }
-//     return mp_const_none;
-// }
-// MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_help_obj, 0, 1, myport_help);
-//
-void pyhelp_print_obj(const mp_obj_t obj) {
-    // try to print something sensible about the given object
-    mp_printf(MP_PYTHON_PRINTER, "object ");
-    mp_obj_print(obj, PRINT_STR);
-    mp_printf(MP_PYTHON_PRINTER, " is of type %s\n", mp_obj_get_type_str(obj));
-
-    mp_map_t *map = NULL;
-    if (MP_OBJ_IS_TYPE(obj, &mp_type_module)) {
-        map = mp_obj_dict_get_map(mp_obj_module_get_globals(obj));
-    } else {
-        mp_obj_type_t *type;
-        if (MP_OBJ_IS_TYPE(obj, &mp_type_type)) {
-            type = obj;
-        } else {
-            type = mp_obj_get_type(obj);
-        }
-        if (type->locals_dict != MP_OBJ_NULL && MP_OBJ_IS_TYPE(type->locals_dict, &mp_type_dict)) {
-            map = mp_obj_dict_get_map(type->locals_dict);
-        }
-    }
-    if (map != NULL) {
-        for (uint i = 0; i < map->alloc; i++) {
-            if (map->table[i].key != MP_OBJ_NULL) {
-                pyhelp_print_info_about_object(map->table[i].key, map->table[i].value);
-            }
-        }
-    }
-}

lib/utils/pyhelp.h

-/*
- * This file is part of the MicroPython project, http://micropython.org/
- *
- * The MIT License (MIT)
- *
- * Copyright (c) 2013-2016 Damien P. George
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-#ifndef __MICROPY_INCLUDED_LIB_UTILS_PYHELP_H__
-#define __MICROPY_INCLUDED_LIB_UTILS_PYHELP_H__
-
-#include "py/obj.h"
-
-void pyhelp_print_obj(const mp_obj_t obj);
-
-#endif // __MICROPY_INCLUDED_LIB_UTILS_PYHELP_H__