btrfs: Drop stray check of fixup_workers creation

The issue was introduced in a79b7d4b,
adding allocation of extent_workers, so this stray check is surely not
meant to be a check of something else.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=82021Reported-by: NMaks Naumov <maksqwe1@ukr.net>
Signed-off-by: NAndrey Utkin <andrey.krieger.utkin@gmail.com>
Reviewed-by: NEric Sandeen <sandeen@redhat.com>
Signed-off-by: NChris Mason <clm@fb.com>

fs/btrfs/disk-io.c

@@ -2601,7 +2601,7 @@ int open_ctree(struct super_block *sb,
 	      fs_info->endio_freespace_worker && fs_info->rmw_workers &&
 	      fs_info->caching_workers && fs_info->readahead_workers &&
 	      fs_info->fixup_workers && fs_info->delayed_workers &&
-	      fs_info->fixup_workers && fs_info->extent_workers &&
+	      fs_info->extent_workers &&
 	      fs_info->qgroup_rescan_workers)) {
 		err = -ENOMEM;
 		goto fail_sb_buffer;