[PATCH -next] btrfs: Remove set but not used variable 'fs_info'

[YueHaibing]

Fixes gcc '-Wunused-but-set-variable' warning:

fs/btrfs/free-space-tree.c: In function 'load_free_space_tree':
fs/btrfs/free-space-tree.c:1535:24: warning:
 variable 'fs_info' set but not used [-Wunused-but-set-variable]

It's not used since commit 05e9d3137d47 ("btrfs: get fs_info from block group
in search_free_space_info"),  so can be removed.

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 fs/btrfs/free-space-tree.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c
index cfe9dfb0ff05..f5dc115ebba0 100644
--- a/fs/btrfs/free-space-tree.c
+++ b/fs/btrfs/free-space-tree.c
@@ -1532,14 +1532,12 @@ static int load_free_space_extents(struct 
btrfs_caching_control *caching_ctl,
 int load_free_space_tree(struct btrfs_caching_control *caching_ctl)
 {
        struct btrfs_block_group_cache *block_group;
-       struct btrfs_fs_info *fs_info;
        struct btrfs_free_space_info *info;
        struct btrfs_path *path;
        u32 extent_count, flags;
        int ret;
 
        block_group = caching_ctl->block_group;
-       fs_info = block_group->fs_info;
 
        path = btrfs_alloc_path();
        if (!path)