chore: remove unused import and upgrade version

package.json

@@ -1,6 +1,6 @@
 {
   "name": "md",
-  "version": "1.5.0",
+  "version": "1.5.5",
   "private": false,
   "scripts": {
     "serve": "node manifest.js & npm run dev:h5",

src/components/CodemirrorEditor/header.vue

@@ -186,7 +186,6 @@
 
 <script>
 import {
-  downloadMD,
   setFontSize,
   fixCodeWhiteSpace,
   setColorWithCustomTemplate,
@@ -287,7 +286,6 @@ export default {
         document.execCommand("copy");
         window.getSelection().removeAllRanges();
         fixCodeWhiteSpace("normal");
-
         clipboardDiv.innerHTML = this.output;
         // 输出提示
         this.$notify({

src/manifest.json

@@ -2,7 +2,7 @@
   "name": "微信 Markdown 编辑器",
   "appid": "",
   "description": "",
-  "versionName": "1.0.0",
+  "versionName": "1.5.5",
   "versionCode": "100",
   "transformPx": false,
   "h5": {