Moved tags/0.23.1 to branches/0.23.1.

git-svn-id: svn://dev.exiv2.org/svn@3070 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
removed errorneous file

git-svn-id: svn://dev.exiv2.org/svn@3071 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3