games/atomix: Fix deinstallation issue involving scores file

The scheme used to leave a non-zero length scores file alone during
deinstallation no longer works under stage. The scheme used a
post-install script to add the scores directory and initial file, but
then tried to remove it using the pkg-plist.

Apparently these need to be matched, which means either the post-install
script is matched with a post-deinstall script, or the creation of the
scores file be done in the pkg-list with @exec. As the logic is slightly
complex, it was easier to solve with a pkg-deinstall script.

There were two unnecessary @dirrmtry lines as well which have been
removed. Bump portrevision for multiple reasons.

Reported by: swills (jenkins)