Remove unnecessary components

src/components/LangSelect/index.vue

-<template>
-  <el-dropdown trigger="click" class="international" @command="handleSetLanguage">
-    <div>
-      <svg-icon class-name="international-icon" icon-class="language" />
-    </div>
-    <el-dropdown-menu slot="dropdown">
-      <el-dropdown-item :disabled="language==='zh'" command="zh">中文</el-dropdown-item>
-      <el-dropdown-item :disabled="language==='en'" command="en">English</el-dropdown-item>
-      <el-dropdown-item :disabled="language==='es'" command="es">Español</el-dropdown-item>
-    </el-dropdown-menu>
-  </el-dropdown>
-</template>
-
-<script>
-export default {
-  computed: {
-    language() {
-      return this.$store.getters.language
-    }
-  },
-  methods: {
-    handleSetLanguage(lang) {
-      this.$i18n.locale = lang
-      this.$store.dispatch('setLanguage', lang)
-      this.$message({
-        message: 'Switch Language Success',
-        type: 'success'
-      })
-    }
-  }
-}
-</script>

src/components/Screenfull/index.vue

-<template>
-  <div>
-    <svg-icon :icon-class="isFullscreen?'exit-fullscreen':'fullscreen'" @click="click" />
-  </div>
-</template>
-
-<script>
-import screenfull from 'screenfull'
-
-export default {
-  name: 'Screenfull',
-  data: function() {
-    return {
-      isFullscreen: false
-    }
-  },
-  mounted() {
-    this.init()
-  },
-  methods: {
-    click() {
-      if (!screenfull.enabled) {
-        this.$message({
-          message: 'you browser can not work',
-          type: 'warning'
-        })
-        return false
-      }
-      screenfull.toggle()
-    },
-    init() {
-      if (screenfull.enabled) {
-        screenfull.on('change', () => {
-          this.isFullscreen = screenfull.isFullscreen
-        })
-      }
-    }
-  }
-}
-</script>
-
-<style scoped>
-.screenfull-svg {
-  display: inline-block;
-  cursor: pointer;
-  fill: #5a5e66;;
-  width: 20px;
-  height: 20px;
-  vertical-align: 10px;
-}
-</style>

src/components/UploadExcel/index.vue

-<template>
-  <div>
-    <input ref="excel-upload-input" class="excel-upload-input" type="file" accept=".xlsx, .xls" @change="handleClick">
-    <div class="drop" @drop="handleDrop" @dragover="handleDragover" @dragenter="handleDragover">
-      Drop excel file here or
-      <el-button :loading="loading" style="margin-left:16px;" size="mini" type="primary" @click="handleUpload">Browse</el-button>
-    </div>
-  </div>
-</template>
-
-<script>
-import XLSX from 'xlsx'
-
-export default {
-  props: {
-    beforeUpload: Function, // eslint-disable-line
-    onSuccess: Function// eslint-disable-line
-  },
-  data: function() {
-    return {
-      loading: false,
-      excelData: {
-        header: null,
-        results: null
-      }
-    }
-  },
-  methods: {
-    generateData({ header, results }) {
-      this.excelData.header = header
-      this.excelData.results = results
-      this.onSuccess && this.onSuccess(this.excelData)
-    },
-    handleDrop(e) {
-      e.stopPropagation()
-      e.preventDefault()
-      if (this.loading) return
-      const files = e.dataTransfer.files
-      if (files.length !== 1) {
-        this.$message.error('Only support uploading one file!')
-        return
-      }
-      const rawFile = files[0] // only use files[0]
-
-      if (!this.isExcel(rawFile)) {
-        this.$message.error('Only supports upload .xlsx, .xls, .csv suffix files')
-        return false
-      }
-      this.upload(rawFile)
-      e.stopPropagation()
-      e.preventDefault()
-    },
-    handleDragover(e) {
-      e.stopPropagation()
-      e.preventDefault()
-      e.dataTransfer.dropEffect = 'copy'
-    },
-    handleUpload() {
-      this.$refs['excel-upload-input'].click()
-    },
-    handleClick(e) {
-      const files = e.target.files
-      const rawFile = files[0] // only use files[0]
-      if (!rawFile) return
-      this.upload(rawFile)
-    },
-    upload(rawFile) {
-      this.$refs['excel-upload-input'].value = null // fix can't select the same excel
-
-      if (!this.beforeUpload) {
-        this.readerData(rawFile)
-        return
-      }
-      const before = this.beforeUpload(rawFile)
-      if (before) {
-        this.readerData(rawFile)
-      }
-    },
-    readerData(rawFile) {
-      this.loading = true
-      return new Promise((resolve, reject) => {
-        const reader = new FileReader()
-        reader.onload = e => {
-          const data = e.target.result
-          const workbook = XLSX.read(data, { type: 'array' })
-          const firstSheetName = workbook.SheetNames[0]
-          const worksheet = workbook.Sheets[firstSheetName]
-          const header = this.getHeaderRow(worksheet)
-          const results = XLSX.utils.sheet_to_json(worksheet)
-          this.generateData({ header, results })
-          this.loading = false
-          resolve()
-        }
-        reader.readAsArrayBuffer(rawFile)
-      })
-    },
-    getHeaderRow(sheet) {
-      const headers = []
-      const range = XLSX.utils.decode_range(sheet['!ref'])
-      let C
-      const R = range.s.r
-      /* start in the first row */
-      for (C = range.s.c; C <= range.e.c; ++C) { /* walk every column in the range */
-        const cell = sheet[XLSX.utils.encode_cell({ c: C, r: R })]
-        /* find the cell in the first row */
-        let hdr = 'UNKNOWN ' + C // <-- replace with your desired default
-        if (cell && cell.t) hdr = XLSX.utils.format_cell(cell)
-        headers.push(hdr)
-      }
-      return headers
-    },
-    isExcel(file) {
-      return /\.(xlsx|xls|csv)$/.test(file.name)
-    }
-  }
-}
-</script>
-
-<style scoped>
-.excel-upload-input{
-  display: none;
-  z-index: -9999;
-}
-.drop{
-  border: 2px dashed #bbb;
-  width: 600px;
-  height: 160px;
-  line-height: 160px;
-  margin: 0 auto;
-  font-size: 24px;
-  border-radius: 5px;
-  text-align: center;
-  color: #bbb;
-  position: relative;
-}
-</style>

src/views/guide/defineSteps.js

@@ -15,14 +15,6 @@ const steps = [
       position: 'bottom'
     }
   },
-  {
-    element: '.screenfull',
-    popover: {
-      title: 'Screenfull',
-      description: 'Bring the page into fullscreen',
-      position: 'left'
-    }
-  },
   {
     element: '.international-icon',
     popover: {