py/objmodule: Move module init/deinit code into runtime functions.

They are one-line functions and having them inline in mp_init/mp_deinit
eliminates the overhead of a function call, and matches how other state
is initialised in mp_init.

py/objmodule.c

@@ -237,14 +237,6 @@ STATIC const mp_rom_map_elem_t mp_builtin_module_weak_links_table[] = {
 MP_DEFINE_CONST_MAP(mp_builtin_module_weak_links_map, mp_builtin_module_weak_links_table);
 #endif
 
-void mp_module_init(void) {
-    mp_obj_dict_init(&MP_STATE_VM(mp_loaded_modules_dict), 3);
-}
-
-void mp_module_deinit(void) {
-    //mp_map_deinit(&MP_STATE_VM(mp_loaded_modules_map));
-}
-
 // returns MP_OBJ_NULL if not found
 mp_obj_t mp_module_get(qstr module_name) {
     mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;

py/objmodule.h

@@ -31,8 +31,6 @@
 extern const mp_map_t mp_builtin_module_map;
 extern const mp_map_t mp_builtin_module_weak_links_map;
 
-void mp_module_init(void);
-void mp_module_deinit(void);
 mp_obj_t mp_module_get(qstr module_name);
 void mp_module_register(qstr qstr, mp_obj_t module);
 

py/runtime.c

@@ -85,8 +85,8 @@ void mp_init(void) {
     // optimization disabled by default
     MP_STATE_VM(mp_optimise_value) = 0;
 
-    // init global module stuff
-    mp_module_init();
+    // init global module dict
+    mp_obj_dict_init(&MP_STATE_VM(mp_loaded_modules_dict), 3);
 
     // initialise the __main__ module
     mp_obj_dict_init(&MP_STATE_VM(dict_main), 1);
@@ -114,7 +114,7 @@ void mp_init(void) {
 
 void mp_deinit(void) {
     //mp_obj_dict_free(&dict_main);
-    mp_module_deinit();
+    //mp_map_deinit(&MP_STATE_VM(mp_loaded_modules_map));
 
     // call port specific deinitialization if any 
 #ifdef MICROPY_PORT_INIT_FUNC