Btrfs: cleanup: remove unnecessary check before btrfs_free_path is called

We need not check path before btrfs_free_path() is called because
path is checked in btrfs_free_path().
Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>

fs/btrfs/dev-replace.c

@@ -183,7 +183,6 @@ int btrfs_init_dev_replace(struct btrfs_fs_info *fs_info)
 	}
 
 out:
-	if (path)
 	btrfs_free_path(path);
 	return ret;
 }

fs/btrfs/inode.c

@@ -6905,7 +6905,6 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
 
 	trace_btrfs_get_extent(root, em);
 
-	if (path)
 	btrfs_free_path(path);
 	if (trans) {
 		ret = btrfs_end_transaction(trans, root);

fs/btrfs/tree-defrag.c

@@ -115,7 +115,6 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
 		ret = -EAGAIN;
 	}
 out:
-	if (path)
 	btrfs_free_path(path);
 	if (ret == -EAGAIN) {
 		if (root->defrag_max.objectid > root->defrag_progress.objectid)