jffs2: Remove C++ style comments from uapi header

Linux kernel tolerates C++ style comments these days. Actually, the
SPDX License tags for .c files start with //.

On the other hand, uapi headers are written in more strict C, where
the C++ comment style is forbidden.

I simply dropped these lines instead of fixing the comment style.

This code has been always commented out since it was added around
Linux 2.4.9 (i.e. commented out for more than 17 years).

'Maybe later...' will never happen.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Richard Weinberger <richard@nod.at>

include/uapi/linux/jffs2.h

@@ -77,11 +77,6 @@
 
 #define JFFS2_ACL_VERSION		0x0001
 
-// Maybe later...
-//#define JFFS2_NODETYPE_CHECKPOINT (JFFS2_FEATURE_RWCOMPAT_DELETE | JFFS2_NODE_ACCURATE | 3)
-//#define JFFS2_NODETYPE_OPTIONS (JFFS2_FEATURE_RWCOMPAT_COPY | JFFS2_NODE_ACCURATE | 4)
-
-
 #define JFFS2_INO_FLAG_PREREAD	  1	/* Do read_inode() for this one at
 					   mount time, don't wait for it to
 					   happen later */