ui: remove emojify.js

packages/ui-default/locales/en.yaml

@@ -23,7 +23,6 @@ problem_edit: Problem Edit
 problem_import: Import Problem
 problem_main: Problem Set
 problem_solution: Problem Solution
-problem_statistics: Problem Statistics
 problem_submit: Problem Submit
 problem_type.default: 'Type: Default'
 problem_type.fileio: 'Type: FileIO ({0})'

packages/ui-default/locales/ko.yaml

@@ -524,7 +524,6 @@ problem_edit: 문제 수정
 problem_import: 문제 가져오기
 problem_main: 문제
 problem_solution: 문제 해설
-problem_statistics: 문제 통계
 problem_submit: 제출
 problem-category-delim: '|'
 problem-subcategory-delim: 、

packages/ui-default/locales/zh.yaml

@@ -566,7 +566,6 @@ problem_edit: 编辑题目
 problem_import: 导入题目
 problem_main: 题库
 problem_solution: 题解
-problem_statistics: 题目统计
 problem_submit: 递交代码
 problem_type.default: 传统题
 problem_type.fileio: '文件IO ({0})'