[f2fs] code refactoring:
remove unnecessary comment (node.h)

Change-Id: I2240caaf73e90f232308e7dc998141c96f4156e1
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/531078
Reviewed-by: Brett Wilson <brettw@google.com>
diff --git a/node.h b/node.h
index d41fb51..f6c8322 100644
--- a/node.h
+++ b/node.h
@@ -13,7 +13,6 @@
 }
 
 /* node block offset on the NAT area dedicated to the given start node id */
-//#define NAT_BLOCK_OFFSET(start_nid) (start_nid / kNatEntryPerBlock)
 inline uint64_t NatBlockOffset(uint32_t start_nid) {
   return start_nid / kNatEntryPerBlock;
 }