btrfs: remove duplicated definition of btrfs_printk_in_rcu()

It's defined twice in a row for the !CONFIG_PRINTK case, so remove one
of the duplicates.

Reviewed-by: Johannes Thumshirn <[email protected]>
Signed-off-by: Filipe Manana <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>

Author: fdmanana

fs/btrfs/messages.h

@@ -28,9 +28,6 @@ void _btrfs_printk(const struct btrfs_fs_info *fs_info, unsigned int level, cons
 
 #else
 
-#define btrfs_printk_in_rcu(fs_info, level, fmt, args...)		\
-	btrfs_no_printk(fs_info, fmt, ##args)
-
 #define btrfs_printk_in_rcu(fs_info, level, fmt, args...)		\
 	btrfs_no_printk(fs_info, fmt, ##args)