extmod/vfs_fat: Remove obsolete and unused str/len members.

cc3200/mptask.c

@@ -302,8 +302,6 @@ STATIC void mptask_init_sflash_filesystem (void) {
     // Initialise the local flash filesystem.
     // init the vfs object
     fs_user_mount_t *vfs_fat = sflash_vfs_fat;
-    vfs_fat->str = NULL;
-    vfs_fat->len = 0;
     vfs_fat->flags = 0;
     pyb_flash_init_vfs(vfs_fat);
 

extmod/vfs_fat.c

@@ -55,8 +55,6 @@ STATIC mp_obj_t fat_vfs_make_new(const mp_obj_type_t *type, size_t n_args, size_
     fs_user_mount_t *vfs = m_new_obj(fs_user_mount_t);
     vfs->base.type = type;
     vfs->flags = FSUSER_FREE_OBJ;
-    vfs->str = NULL;
-    vfs->len = 0;
     vfs->fatfs.drv = vfs;
 
     // load block protocol methods

extmod/vfs_fat.h

@@ -36,8 +36,6 @@
 
 typedef struct _fs_user_mount_t {
     mp_obj_base_t base;
-    const char *str;
-    uint16_t len; // length of str
     uint16_t flags;
     mp_obj_t readblocks[4];
     mp_obj_t writeblocks[4];

stmhal/main.c

@@ -167,8 +167,6 @@ static const char fresh_readme_txt[] =
 MP_NOINLINE STATIC bool init_flash_fs(uint reset_mode) {
     // init the vfs object
     fs_user_mount_t *vfs_fat = &fs_user_mount_flash;
-    vfs_fat->str = NULL;
-    vfs_fat->len = 0;
     vfs_fat->flags = 0;
     pyb_flash_init_vfs(vfs_fat);
 
@@ -274,8 +272,6 @@ STATIC bool init_sdcard_fs(bool first_soft_reset) {
         if (vfs == NULL || vfs_fat == NULL) {
             break;
         }
-        vfs_fat->str = NULL;
-        vfs_fat->len = 0;
         vfs_fat->flags = FSUSER_FREE_OBJ;
         sdcard_init_vfs(vfs_fat, part_num);