Update to adapt new rule.
remove unnecessary file
Merge branch 'master' into ray_ai
Merge branch 'master' into ray_ai
Merge branch 'ray_ai' into ray_ai_contest
Ignore the new rule. Change threshold
Merge branch 'master' of https://github.com/sadakatsu/SpeedClueContest into ray_ai_contest
Merge pull request #14 from ZhanruiLiang/ray_ai_contest

Revert code