(fixes #3024)remove Japanese Upgrade_From_2_Guide.txt.
(fixes #3024)remove Japanese Upgrade_From_2_Guide.txt.

tejima/OP3PKG,tejima/OP3PKG,nise-nabe/ppcon-sns,openpne/OpenPNE3,openpne/OpenPNE3,openpne/OpenPNE3,openpne/OpenPNE3,nise-nabe/ppcon-sns