On the multi-layer-moves branch, add a comment.
On the multi-layer-moves branch, add a comment.

* subversion/libsvn_wc/wc_db.c
  (delete_node): Add a comment to clarify intentions.


git-svn-id: 431bda003dbfb1e8904f1a1119768f7246d9e1a8@1293129 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion