fs/locks.c: Remove stale FIXME left over from BKL conversion

The comment is no longer true as (now that the BKL conversion is
finished) a spinlock _is_ now used to protect file_lock_list,
blocked_list and inode->i_flock.
Signed-off-by: NMatt Fleming <matt.fleming@linux.intel.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

fs/locks.c

@@ -145,7 +145,6 @@ static DEFINE_SPINLOCK(file_lock_lock);
 
 /*
  * Protects the two list heads above, plus the inode->i_flock list
- * FIXME: should use a spinlock, once lockd and ceph are ready.
  */
 void lock_flocks(void)
 {