Remove jszip dependency and unused Export2Zip.js

package.json

@@ -51,7 +51,6 @@
     "fuse.js": "3.4.2",
     "js-cookie": "2.2.0",
     "jsonlint": "1.6.3",
-    "jszip": "3.1.5",
     "localforage": "^1.7.3",
     "lodash": "^4.17.11",
     "lodash.debounce": "^4.0.8",

src/vendor/Export2Zip.js

@@ -1,24 +0,0 @@
-/* eslint-disable */
-require('script-loader!file-saver');
-import JSZip from 'jszip'
-
-export function export_txt_to_zip(th, jsonData, txtName, zipName) {
-  const zip = new JSZip()
-  const txt_name = txtName || 'file'
-  const zip_name = zipName || 'file'
-  const data = jsonData
-  let txtData = `${th}\r\n`
-  data.forEach((row) => {
-    let tempStr = ''
-    tempStr = row.toString()
-    txtData += `${tempStr}\r\n`
-  })
-  zip.file(`${txt_name}.txt`, txtData)
-  zip.generateAsync({
-    type: "blob"
-  }).then((blob) => {
-    saveAs(blob, `${zip_name}.zip`)
-  }, (err) => {
-    alert('导出失败')
-  })
-}