fix: remove year on side menu

src/options/views/main.html

@@ -2,7 +2,6 @@
   <aside>
     <img src="/images/icon128.png">
     <h1 v-text="i18n('extName')"></h1>
-    <div class="mb-1">2013-2017</div>
     <hr>
     <div class=sidemenu>
       <a href="#main/Installed" :class="{active:tab==='Main'}" v-text="i18n('sideMenuInstalled')"></a>