translate-comments: Milestone.java
translate-comments: Milestone.java

- remove redundant method comments
- translate korean to english

yona-projects/yona,brainagenet/yobi,brainagenet/yobi,oolso/yobi,doortts/forked-for-history,yona-projects/yona,violetag/demo,doortts/forked-for-history,doortts/forked-for-history,ahb0327/yobi,ihoneymon/yobi,oolso/yobi,naver/yobi,ihoneymon/yobi,bloodybear/yona,yona-projects/yona,doortts/fork-yobi,oolso/yobi,doortts/fork-yobi,bloodybear/yona,bloodybear/yona,Limseunghwan/oss,doortts/fork-yobi,bloodybear/yona,Limseunghwan/oss,doortts/fork-yobi,Limseunghwan/oss,violetag/demo,naver/yobi,ihoneymon/yobi,ahb0327/yobi,yona-projects/yona,ahb0327/yobi,naver/yobi,brainagenet/yobi