btrfs: Remove fs_info from remove_extent_data_ref

This function is always called with a valid transaction from where the
fs_info can be referenced. No functional change.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/extent-tree.c

@@ -1383,7 +1383,6 @@ static noinline int insert_extent_data_ref(struct btrfs_trans_handle *trans,
 }
 
 static noinline int remove_extent_data_ref(struct btrfs_trans_handle *trans,
-					   struct btrfs_fs_info *fs_info,
 					   struct btrfs_path *path,
 					   int refs_to_drop, int *last_ref)
 {
@@ -1420,7 +1419,7 @@ static noinline int remove_extent_data_ref(struct btrfs_trans_handle *trans,
 	num_refs -= refs_to_drop;
 
 	if (num_refs == 0) {
-		ret = btrfs_del_item(trans, fs_info->extent_root, path);
+		ret = btrfs_del_item(trans, trans->fs_info->extent_root, path);
 		*last_ref = 1;
 	} else {
 		if (key.type == BTRFS_EXTENT_DATA_REF_KEY)
@@ -2020,7 +2019,7 @@ static int remove_extent_backref(struct btrfs_trans_handle *trans,
 		update_inline_extent_backref(fs_info, path, iref,
 					     -refs_to_drop, NULL, last_ref);
 	} else if (is_data) {
-		ret = remove_extent_data_ref(trans, fs_info, path, refs_to_drop,
+		ret = remove_extent_data_ref(trans, path, refs_to_drop,
 					     last_ref);
 	} else {
 		*last_ref = 1;