Remove nonexistent file

Signed-off-by: HAYASHI Kentaro <hayashi@clear-code.com>
Bump up version number to 4.0.8

Signed-off-by: HAYASHI Kentaro <hayashi@clear-code.com>
Update to the latest release

  % make update-latest-release \
         OLD_RELEASE=4.0.7 \
         OLD_RELEASE_DATE=2014-10-29 \
         NEW_RELEASE_DATE=2014-11-29

Signed-off-by: HAYASHI Kentaro <hayashi@clear-code.com>